The fact that you may honestly believe you are not biased does not free you from unconscious racism. This comes from an article by Toure in Time magazine. 

The racist mind need not hate every black person it encounters, and indeed not hating all may serve as a valuable safety valve, releasing pressure and proving to the mind itself that it is not racist. Few people want to think of themselves as bad or evil,” writes Toure. 

Toure’s book “Whose Afraid of Post-Blackness? What It Means to be Black Now” was named a New York Times notable book in 2011.