Leo, if you do the math on the numbers, you'll see that the "racist yes votes" simply aren't enough to make up the spread. There simply aren't enough black people in the country to do that. A certain percentage of blacks always, always, always vote for the Democrat. The difference in those who would have voted Democratic anyway and the the number of black votes that he actually got, would surprise you. The Hispanics voted for him in numbers that were twice that of previous Democrats, but even those numbers added to the black vote isn't enough to close the spread.
Obama increased the Democratic voter percentage across the board, among whites, blacks, Hispanics, males and females. There was no category that you can point to and go, "Ah hah!". It was small, incremental gains all over the place.
The only anomaly, if it can be called one, is the first-time voters. The first-time voter percentages were nearly identical to the first-time voters of previous years (contrary to popular belief), but what was different is that instead of 55% or so of them voting Democtratic, as what usually happens, it was roughly 70%, more than tho-thirds.
Another factor that comes into play, though, is the fact that whites in America are a dwindling breed. Recently whites made up 85% of the voters, now it's 74%. They say that in 30 years whites will actually be a minority. The face of America is changing, and many of us white old farts are gonna have a real problem with that. Forget that fact that old farts don't like change in the first place, 'cause we're set in our ways and we like it that way, we see our power slipping away and there's nothing we can do about it.