NEW YORK (AP) — A racist ideology seeping from the internet’s fringes into the mainstream is being investigated as a motivating factor in the supermarket shooting that killed 10 people in Buffalo, New York. Most of the victims were Black.
Ideas from the “great replacement theory” filled a racist screed supposedly posted online by the white 18-year-old accused of targeting Black people in Saturday’s rampage. Authorities were still working to confirm its authenticity.
Certainly, there was no mistaking the racist intent of the shooter.

AP Photo/Matt Rourke
Investigators work the scene of a shooting at a supermarket in Buffalo, N.Y., Monday, May 16, 2022.
WHAT IS THE ‘GREAT REPLACEMENT THEORY’?
Simply put, the conspiracy theory says there’s a plot to diminish the influence of white people.
Believers say this goal is being achieved both through the immigration of nonwhite people into societies that have largely been dominated by white people, as well as through simple demographics, with white people having lower birth rates than other populations.
The conspiracy theory’s more racist adherents believe Jews are behind the so-called replacement plan: White nationalists marching at a Charlottesville, Virginia, rally that turned deadly in 2017 chanted “You will not replace us!” and “Jews will not replace us!”
A more mainstream view in the U.S. baselessly suggests Democrats are encouraging immigration from Latin America so more like-minded potential voters replace “traditional” Americans, says Mark Pitcavage, senior research fellow at the Anti-Defamation League Center on Extremism.
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WHAT ARE THIS CONSPIRACY THEORY’S ORIGINS?
How long has racism existed? Broadly speaking, the roots of this “theory” are that deep. In the U.S., you can point to efforts to intimidate and discourage Black people from voting — or, in antagonists’ view, “replacing” white voters at the polls — that date to the Reconstruction era, after the 15th Amendment made clear suffrage couldn’t be restricted on account of race.
In the modern era, most experts point to two influential books. “The Turner Diaries,” a 1978 novel written by William Luther Pierce under the pseudonym Andrew Macdonald, is about a violent revolution in the United States with a race war that leads to the extermination of nonwhites.
The FBI called it a “bible of the racist right,” says Kurt Braddock, an American University professor and researcher at the Polarization and Extremism Research & Innovation Lab.
Renaud Camus, a French writer, published a 2011 book claiming that Europe was being invaded by Black and brown immigrants from Africa. He called the book “Le Grand Remplacement,” and a conspiracy’s name was born.
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WHO ARE ITS ADHERENTS?
To some of the more extreme believers, certain white supremacist mass killers — at a Norway summer camp in 2011, two Christchurch, New Zealand, mosques in 2019, a Pittsburgh synagogue in 2018, a Black church in Charleston, South Carolina, in 2017 — are considered saints, Pitcavage says.

AP Photo/Gene J. Puskar
Tree of Life Synagogue Vice President Alan Hausman wears a Stronger Than Hate yarmulke during a Commemoration Ceremony in Schenley Park, in Pittsburgh's Squirrel Hill neighborhood, on Wednesday, Oct. 27, 2021.
Those “accelerationist white supremacists” believe small societal changes won’t achieve much, so the only option is tearing down society, he says.
The Buffalo shooter’s purported written diatribe and some of the methods indicate he closely studied the Christchurch shooter — particularly the effort to livestream his rampage. According to apparent screenshots from the Buffalo broadcast, the shooter inscribed the number 14 on his gun, which Pitcavage says is shorthand for a 14-word white supremacist slogan.
A written declaration by the Christchurch shooter was widely spread online. If the message attributed to the Buffalo shooter proves authentic, it’s designed to also spread his philosophy and methods to a large audience.
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IS THE THEORY MAKING WIDER INROADS?
While more virulent forms of racism are widely abhorred, experts are concerned about extreme views nonetheless becoming mainstream.
In a poll released last week, The Associated Press and the NORC Center for Public Affairs Research found that about 1 in 3 Americans believe an effort is underway to replace U.S.-born Americans with immigrants for electoral gain.
On a regular basis, many adherents to the more extreme versions of the “great replacement” theory converse through encrypted apps online. They tend to be careful. They know they’re being watched.
“They are very clever,” Braddock says. “They don’t make overt calls to arms.”
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WHO’S TALKING UP THIS THEORY?
In particular, Tucker Carlson, Fox News’ most popular personality, has pushed false views that are more easily embraced by some white people who are concerned about a loss of their political and social power.

AP Photo/Richard Drew, File
FILE - In this March 2, 20217, file photo, Tucker Carlson, host of "Tucker Carlson Tonight," poses for photos in a Fox News Channel studio in New York.
“I know that the left and all the gatekeepers on Twitter become literally hysterical if you use the term ‘replacement,’ if you suggest the Democratic Party is trying to replace the current electorate, the voters now casting ballots, with new people, more obedient voters from the Third World,” he said on his show last year. “But they become hysterical because that’s what’s happening, actually, let’s just say it. That’s true.”
A study of five years’ worth of Carlson’s show by The New York Times found 400 instances where he talked about Democratic politicians and others seeking to force demographic change through immigration.
Fox News defended the host, pointing to repeated statements that Carlson has made denouncing political violence of all kinds.
The attention paid by many Republican politicians to what they see as a leaky southern border along the United States has been interpreted, at least by some, as a nod to the concern of white people who worry about being “replaced.”
House Republican Conference Chair Elise Stefanik’s campaign committee was criticized last year for an advertisement that said “radical Democrats” were planning a “permanent election insurrection” by granting amnesty to undocumented immigrants who would create a permanent liberal majority in Washington. Stefanik represents a New York district.
Pitcavage says he’s concerned about the message Carlson and supporters are sending: “It actually introduces the ‘great replacement theory’ to a conservative audience in an easier-to-swallow pill.”
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
Flowers and candles lay outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
Flowers and candles lay outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
Children walk hand in hand out near the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
Children walk hand in hand out near the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People pay their respects outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People pay their respects outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
A person pauses outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
A person pauses outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People embrace outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People embrace outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
A person is overcome with emotions outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
A person is overcome with emotions outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People gather outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People gather outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People embrace outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People embrace outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People gather outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People gather outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
A woman and child place flowers outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
A woman and child place flowers outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People gather outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People gather outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Joshua Bessex
Worshippers are overcome with emotion during a service at True Bethel Baptist Church on Sunday, May 15, 2022, in Buffalo, N.Y. (AP Photo/Joshua Bessex)
Joshua Bessex
Worshippers are overcome with emotion during a service at True Bethel Baptist Church on Sunday, May 15, 2022, in Buffalo, N.Y. (AP Photo/Joshua Bessex)
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The victims: What we know about those killed, injured in Buffalo shooting
Joshua Bessex
Worshippers impacted by the shooting at a Buffalo supermarket pray at True Bethel Baptist Church on Sunday, May 15, 2022, in Buffalo, N.Y. (AP Photo/Joshua Bessex)
Joshua Bessex
Worshippers impacted by the shooting at a Buffalo supermarket pray at True Bethel Baptist Church on Sunday, May 15, 2022, in Buffalo, N.Y. (AP Photo/Joshua Bessex)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People hold hands as they pray outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People hold hands as they pray outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People march to the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People march to the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People pray outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People pray outside the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People march to the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People march to the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
A person holds a flower as a group prays outside of the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
A person holds a flower as a group prays outside of the scene of a shooting at a supermarket in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People pray outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. A white 18-year-old wearing military gear and livestreaming with a helmet camera opened fire with a rifle at a supermarket in Buffalo, killing and wounding people in what authorities described as “racially motivated violent extremism.” (AP Photo/Matt Rourke)
Matt Rourke
People pray outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. A white 18-year-old wearing military gear and livestreaming with a helmet camera opened fire with a rifle at a supermarket in Buffalo, killing and wounding people in what authorities described as “racially motivated violent extremism.” (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Joshua Bessex
A man reads scripture at the site of a memorial honoring the victims of Saturday's shooting on Sunday, May 15, 2022, in Buffalo, N.Y. A white 18-year-old wearing military gear and livestreaming with a helmet camera opened fire with a rifle at a supermarket, killing and wounding people in what authorities described as “racially motivated violent extremism.” (AP Photo/Joshua Bessex)
Joshua Bessex
A man reads scripture at the site of a memorial honoring the victims of Saturday's shooting on Sunday, May 15, 2022, in Buffalo, N.Y. A white 18-year-old wearing military gear and livestreaming with a helmet camera opened fire with a rifle at a supermarket, killing and wounding people in what authorities described as “racially motivated violent extremism.” (AP Photo/Joshua Bessex)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
Tears form in Steve Carlson's eyes as he speaks about his former neighbor Kat Massey who was among the victims of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
Tears form in Steve Carlson's eyes as he speaks about his former neighbor Kat Massey who was among the victims of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People embrace outside the scene of a shooting at a supermarket a day earlier, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People embrace outside the scene of a shooting at a supermarket a day earlier, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
A person pays his respects outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
A person pays his respects outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
People pray outside the scene of Saturday's shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
People pray outside the scene of Saturday's shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
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The victims: What we know about those killed, injured in Buffalo shooting
Matt Rourke
A person pays his respects outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)
Matt Rourke
A person pays his respects outside the scene of a shooting at a supermarket, in Buffalo, N.Y., Sunday, May 15, 2022. (AP Photo/Matt Rourke)