We should be very wary of rhetoric that depends on changing definitions of terms without providing precise definitions (see also "racism"). Put differently, everyone's ideas should be criticized on their own terms, but you oughtn't be taken seriously if you don't even define your own terms (and defining them in terms of other poorly defined terms--e.g., "'anti-racism' opposing racism"--doesn't count).
If you can be convinced that the status quo is oppressive to racial minorities, then it serves to perpetuate white supremacy.
I don't follow your first point, since it seems clear to me that people of color, jewish people, and homosexuals are able to hold white supremacist viewpoints.