Just a little geneology on "ethnic replacement"
.....comes almost directly from The Turner Diaries, a racist novel self-published in 1978 by neo-Nazi William Luther Pierce, writing under the pen name Andrew Macdonald.
J.M. Berger, an expert on extremism, estimated that The Turner Diaries had inspired at least 200 murders since it was published.
The idea was partially popularized in a 2012 book by French philosopher Renaud Camus, and it's articulated in another white nationalist trope, the "14 Words":
Timothy McVeigh, the terrorist behind the 1995 Oklahoma City bombing, which killed 168 people, helped launch the novel to international fame when it was reported that his attack was styled on The Order.
White supremacist protesters at the Unite The Right Rally in Charlottesville, Virginia were heard chanting “You will not replace us"
In October 2018, Republican congressman Steve King endorsed the conspiracy theory
Media Matters reported how Tucker Carlson had begun promoting the conspiracy theory.
By July 2019, media covered how US president Donald Trump had become one of the most influential proponents of the conspiracy theory. Reporting the Institute for Strategic Dialogue's findings that Trump consistently referenced the Great Replacement, the president's Twitter account was identified as one of the top ten promoters of the ideology. His history of describing Muslims and migrants as "invaders", according to SBS News, closely mirrors the language of explicit supporters of the theory.
“I have a feeling that a lot of the numbers that are being said in some areas are just bigger than they’re going to be,” Trump told Fox News’ Sean Hannity on Thursday night. “I don’t believe you need 40,000 or 30,000 ventilators.