"Did you happen to notice that, oh, at least two or three WHITE PEOPLE voted for Barack Obama?"

That is exactly the point. Many white people have voted FOR Obama. He won wide majorities in some disctricts where very few black people live. In contrast very few black voters have voted for Clinton. Less than 10% in the majority of the primaries. Blacks have supported her in the past and there is very little difference in her and Obama's political policies. So what could be the reason? Oh and to further strengthen my observations; very few black women voted for Clinton. So I guess racism trumps sexism.