Because a lot of Black voters DID vote for him because he was Black the first time around. Big deal. They did. If there was a Persian candidate, I'd wanna vote for him too, there's no need to sit around lying about things. They still would have voted for him if he was White but more people turned out to the polls period because he was Black.
Whites have voted for Whites for decades, but they aren't a marginalized group and all the candidates have ALWAYS been White. The comparison is illogical, and no it's not a double standard. Well, maybe it is becoming one NOW, but it wasn't before.
Yes, the president was elected by a cross cultural / gender / age populace. What does that have to do with the Black vote? Your'e asking about Black voters, not who made President O win. Even if every single Black person in America voted for President O, it wouldn't necessarily mean he wins. The two issues are not related.
BQ: Actually I do dislike him more because he is Black and I will tell you why. I like Black people, and I am disappointed that the first Black president is this guy who basically acts like George Bush 2.0. I'm disappointed that we had the awesome thing of having the first (half) Black president and it ended up getting wasted on some jackazz Wallstreet loving Israeli dyck riding con man who lied to everyone and told them there would be change and then did not deliver. I would have preferred the first Black president to be like the saviour of the people... someone who wasn't evil enough to align as being a Republican or Democrat.