You already know that white supremacists don't really feel supreme. If you feel supreme, you don't spend all your time complaining about everyone else. White supremacists are animated not by pride in self (not that pride is a trouble-free sentiment), but by hatred for those who are not white.
This is obvious, but it's not an isolated thing. Black Lives Matter is really about accusing others, particularly the police, of thinking that black lives don't matter. Antifa is about accusing everyone who doesn't agree with leftism of being a fascist, which is rich coming from the people who want to force Christian bakers to bake gay wedding cakes, but I digress.