Either you have a provable case on this, with objective facts, that can help get that professor fired, or what you're doing is walking around with a chip on your shoulder.
Since when is a provable case with objective facts enough to do anything? Let's see, Rodney King, Amidou Diallo, countless lynched black folks, and so on. Some of those must have had provable cases with objective facts, but that isn't necessarily enough cut through a thick layer of racism.
Maybe if you're a white guy, you can count on objective facts (or maybe not, if the other person has more money/power/friends/etc). And as a white person, I don't think you're in a good position to be telling someone that they have a chip on their shoulder. Lots of non-white people have damn good reasons for believing that they weren't being treated fairly, and to belittle that as "a chip on their shoulder" is incredibly offensive. But you simply cannot walk a mile in those shoes.