Let me get this straight; you're saying that the suggestion that a black person not vote for someone that is historically known for his racism towards black people is itself racist?
I suppose you agree with all the GOP supporters that called Obama racist? Of course, what they weren't cognisant of was that they only said this because, seeing a black man as president, brought their prejudices out.
Like all the blue collar white men that voted against Obama because they were worried that he'd give blue collar black men a fairer deal.