Hey! But he teaches at Princeton, wears glasses and a suit and tie! He CAN’T be a liberal, racist, bigot, can he?
He was born in Mississippi, went to Morehouse College as an undergraduate, and has a master's degree and a Ph.D. (in Religion) from Princeton. He is a professor of Religion and of African American Studies. It isn't common for a major university to hire its own Ph.D.'s (but he did teach elsewhere first before returning to Princeton).
Since he specializes in African American religion, it's likely that the other candidates for his current position were also black, or most of them.