The distinction has to be made. Just using the term broadly as "discrimination" isn't specific enough.
You say "white supremacy" is dramatic. Good, that's the idea. See dramatics draw attention and focus.
Causes us to recognize or acknowledge that when someone says "white supremacy", what is that someone is saying?
Are people just talking about discrimination or something that is actually absolutely deleterious, not justified but a form of mistreatment?
Again people may stray away because it sounds like to some at least that a generalization is being made on white people .
Which just causes for more attention and perhaps awareness for what can be an underlying issue kept covertly and under the radar towards victims of that ongoing mistreatment.
But if you want to learn more, look up Mr. Neely Fuller Jr. and another although passed on now, Dr. Frances Cres Welsing. That's either "Cres" or "Cress".
Mr . Fuller is an author and regular guest every Tuesday on a call-in internet radio program, 9am U.S. Eastern time. Podcasts are available on blog talkradio.com/producejustice