I agree with you that everyone has some level of bias, but we disagree on to what degree people are biased. Race is a very complex issue in American society. It permeates everything: politics, economics, academia. And it's visually obvious. The evidence is pretty clear to me (all the statistics related to how racial judgments are made, how stunningly often resumes get rejected if they have names that sound like they belong to certain racial groups), that race plays a very large role in people's snap judgments of others.