This shyt has been around for decades but it became the motivation for mass shootings in the last four years. This is at least the 4th major mass shooting where the killers believed in some version of Replacement Theory.
The Pittsburg synagogue shooter (17 shot, 11 dead) said that Jews were were bringing "invaders" into the country to kill white people
Pittsburgh synagogue shooting - Wikipedia
The Christchurch mosque shooter (91 shot, 51 dead) titled his manifesto the "The Great Replacement" and was afraid of white genocide
Christchurch mosque shootings - Wikipedia
The El Paso Walmart shooter (46 shot, 23 dead) echoed the Chistchurch shooter's themes with a similar manifesto
2019 El Paso shooting - Wikipedia
Now the Buffalo market shooter (13 shot, 10 dead) has attributed the same theory to why he had to kill black people
2022 Buffalo shooting - Wikipedia
The Pittsburg synagogue shooter (17 shot, 11 dead) said that Jews were were bringing "invaders" into the country to kill white people
Pittsburgh synagogue shooting - Wikipedia
Bowers had earlier posted antisemitic comments against HIAS (formerly, Hebrew Immigrant Aid Society) on the online alt-tech social network Gab. Dor Hadash had participated in HIAS's National Refugee Shabbat the previous week. Referring to Central American migrant caravans and immigrants, Bowers posted a message on Gab in which he wrote that "HIAS likes to bring invaders in that kill our people. I can't sit by and watch my people get slaughtered. Screw your optics, I'm going in."
The Christchurch mosque shooter (91 shot, 51 dead) titled his manifesto the "The Great Replacement" and was afraid of white genocide
Christchurch mosque shootings - Wikipedia
Tarrant claims to be the author of a 74-page manifesto titled The Great Replacement, a reference to the "Great Replacement" and "white genocide" conspiracy theories. It said that the attacks were planned two years prior, and the location was selected three months prior. Minutes before the attacks began, the manifesto was emailed to more than 30 recipients, including the prime minister's office and several media outlets, and links were shared on Twitter and 8chan.
The El Paso Walmart shooter (46 shot, 23 dead) echoed the Chistchurch shooter's themes with a similar manifesto
2019 El Paso shooting - Wikipedia
Police believe a manifesto with white nationalist and anti-immigrant themes, posted on the online message board 8chan shortly before the attack, was written by Crusius; it cites the year's earlier Christchurch mosque shootings in New Zealand and the far-right conspiracy theory known as the Great Replacement as inspiration for the attack.
Now the Buffalo market shooter (13 shot, 10 dead) has attributed the same theory to why he had to kill black people
2022 Buffalo shooting - Wikipedia
Gendron is reported to have written a 180-page manifesto released prior to the shooting, primarily concerning the topic of mass immigration, promoting the white nationalist far-right "Great Replacement" conspiracy theory of Renaud Camus, that whites are being subject to genocide through decreasing white birth rates. The manifesto claims the Jews to be responsible for non-white immigration, and that non-whites would overwhelm and wipe out the white race and expressed support for Dylann Roof and Brenton Tarrant.