White supremacists have a view of history that revolves around, well, white superiority. That includes the idea that white people, and especially white institutions, would not engage in genocide.

They need to shut down talk of stuff like this - like, desperately need to - because it threatens their identity and entire world view. They’re taking the idea that white people, and particularly white Canadians, and especially white Canadian religious institutions could be associated with a known bad-ideas like “genocide” and “child murder” as an existential threat.

And it kind of is, at least to their understanding of the world.