Replacement theory isn't new – 3 things to know about how this once-fringe conspiracy has become more mainstream

…One key element of replacement theory targets immigrants, and the belief that immigrants are part of a plot to replace the political power and culture of white people living in Western countries. 

But the theory isn't just about immigrants. Like the rest of white supremacist ideology, replacement theory also extends to Jewish people and Black people, seeing them as inferior and a threat to white people. The Buffalo shooter targeted victims in a predominantly Black neighborhood, and because they were Black…

https://theconversation.com/replacement-theory-isnt-new-3-things-to-know-about-how-this-once-fringe-conspiracy-has-become-more-mainstream-183492