[xzins]

This is the wiki definition of white supremacism:

“White supremacy or white supremacism is a racist ideology centered upon the belief, and the promotion of the belief, that white people are superior in certain characteristics, traits, and attributes to people of other racial backgrounds and that therefore white people should politically, economically and socially rule non-white people.”

I always thought it was just a hatred of black people.

[Responsibility2nd]

Of course one could always use the BLM/liberal media definition of a White Supremacist...

Any white person.