Painting portraits of racism is no way to make the subjects of such portraits vote for Obama. It will never work. We have secret ballots. I'd be inclined to vote against Obama just to make these supporters right. But....
I have made a personal decision that as a white man I can never, from now on, support a candidate who isn't white. I have decided I cannot support a female candidate of any color. I, like everyone else (apparently), have an overwhelming need to be true to myself. I will support only white men because they look like me.
I have made these decisions because I cannot allow women who support only other women, and non-white people who support only other non-white, appear to be wrong in their decisions. I would be making a mockery of their convictions if I did not follow their prescription. It would be racist and sexist of me to project an image that I am too good and intelligent to participate in identity politics, which surely must be the right thing to do.