"Everyone I Don't Like Is Hitler A White Supremacist" has been the left's playbook for the last several years. They don't have to have any evidence at all. The mere fact that he's "not on their side" (the side of rioters and anarchists and communists who want to burn the whole country down) is enough to convince them that he MUST therefor be a nasty Nazi white supremacist racist, because that's how they rationalize that the violence they attempted to inflict upon him was justified and he was NOT justified in defending himself.