Because far too many of them are mindless sheep who believe whatever they're told and they traffic, they swim, and live in a place of constant fear. The more mentally inert of them can be told by any kind of white male authority what to think and how to feel about anyone and anything.
White people in the US have been swimming in fear for decades, which is why they are willing to believe anything about us, that certain politicians, over one hundred years of entertainment media, and their own inner guilt over the atrocities they committed against us, tells them, no matter how batshit it sounds!
I've always said that white people, like all narcissists, seek to displace their worst sins onto the backs of those they've sinned the worst against. Rather than take accountability for the atrocities they've committed against Black and Indigenous people, they've spent the past four hundred years saying we all deserved it, because we are the ones who are the monsters.