Honestly, and with all due respect, I'm not sure I understand why we're debating these semantic distinctions. Whether a racist is one with power, or merely a bigot, is not really meaningful to me. At the root, is the exact same sore - festering inside someone. If that sore exists - then it merely awaits an opportunity to infect others.
I could certainly create a belief system that says that racism is one who makes judgments based upon race and that discrimination is the impact of one's racist decision's - but what do I know.