Congratulations, you identified examples that apply to approximately 4% of white American voters and are noteworthy for their exceptionality. Not only that, but you did so without reference to the very many African-American candidates who have run with white electorates--and lost.
Blacks are only 12% of the population you know. I could have named plenty of white candidates who ran in African-American electorates and lost too.
Do you seriously want to argue that most white voters are just fine voting for black candidates regardless of race? Have you heard of the Bradley effect?
There are plenty of white voters who are anxious TO vote for a black candidate.
You do know that the Bradley effect term is almost 30 years old, right?
Again, a minority voting for a minority candidate in a winner-takes-all system, when they have consistently voted for members of the majority in other elections, is not racism.
If they are preferencing a candidate because of their own prejudice towards that race, then it is most definately racially prejudiced behavior. This is simple common sense here.
I live in a majority-black county. Would it not be racist for me to vote for a white candidate just because they were white?
No it would not. For example, if I were South African, I'dve voted against the ANC in the last election...the opposition leader happening to be white...not for racial reasons, but because Thabo Mbeki's a piss-poor leader.