"White supremacy" is something ultra-right wing racist white trash conservatives made up so they can feel that their total waste of space dead end lives not only matter, but are somehow better than those who are bypassing them and all that needs to be done is restart slavery to prove it.
Don't like the term? Welcome to the club. Tell your buddies to stop using it.
KKK, Hitler, National Front, neo-Nazi Skinheads. Google.