"Society is biased against black people" is a perfectly accurate statement, so I'm not sure what that is supposed to show.

Can't you make an objectively-true equivalent statement about height? People with certain ethnicities are taller. Taller people are treated better. It's unfair.

It doesn't seem like the way that logic is constructed reveals any racism. Just the premise of "X are smarter than Y" is the problem. Kind of begging the question.