A very point is found here:
Yesterday as I was leaving Wal-Mart I spotted a Black man wearing a t-shirt that said “My President is Black” surrounding a picture of Obama. While I think it is generally unhelpful for White people to play the morally superior color blind card, in this case it is instructive. Can you imagine the outrage if the election had gone differently and a White person wore a shirt with McCain and the words “My President is White?”
Yes, I could imagine it. I could also imagine the damn riots that would have broken out all across Black America, if Obama had lost too. It would have not been pretty.