I appreciate you taking the time to read and share your opinion. The truth is white supremacy or extremist was coined because of a theory backed by whites, the replacement theory.
And most reports on mass shooting all points to whites but since not all whites are bad, a tag to differentiate the bad eggs is necessary, hence supremist and in worst cases, extremist is used.
You do realise whites don't see blacks as fully born and bred Americans, right? So if we are to drop the colour differentiation it will be great because that will solve a lot of our problems with racism. But since that time isn't upon us, it will be unfair to drag the blacks into a mess whites created.
Leaders like JF Kennedy and Martin Luther King and a host of others openly fought against racism, now we see most white hiding in the shadows while blacks are butchered.
So forgive me if I generalised. You know that they say, one bad apple spoils the bunch. Maybe whites can wake up and stop acting ignorant in the face of racism, which is the purpose of the generalization principle anyway.