This is just an endless cycle. Any language is going to need a word that roughly corresponds to "supremacy." If the word supremacy didn't exist, white supremacists would have used some other word like "white dominance" so then we would be having a conversation about banning the word dominance. But then, the language is still going to need to have a word meaning "better than everything else" so we will just end up creating a new word. And then maybe that will get used in some unsavory context, so we ban that word. And so on and so forth.

This exact cycle is happening after we banned the term "mental retardation." Now you hear people, who would have called someone "retarded," calling people "autistic." Pretty soon we'll have to ban the word autistic. But we'll still need a word to describe people with what we currently call intellectual disability. It will never end. The banning of words and the creation of new words to replace them.

Words have no meaning outside of the context they are used. They're just phonemes or character strings without context.