While it isn't helpful that you're focusing on definitional terms rather than the point, the dictionary doesn't really back you up here anyhow.
My point is that the resulting behaviors and discrimination can still be racist, even if they don't have their ultimate roots in racism itself.
From your link:
> also : behavior or attitudes that reflect and foster this belief : racial discrimination or prejudice
> : the systemic oppression of a racial group to the social, economic, and political advantage of another
Edit: Anyway, I do recognize that the distinction you're pointing out does have implications for the best way to address the problems.