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You're missing the central point. Obama made his comments in the context of "why can't you get those (under-educated, ignorant, white) blue collar voters to vote for you" and his answer was because they don't like "people that don't look like them".
In other words, if you don't vote for me, you're a bigot.
Couldn't possible me any other reason, could there?
It's not the first time this has been implied or outright stated in this campaign. Kondracke on Fox: "I don't see any other reason Democratic voters wouldn't vote for Obama.", and the NYT Magazine article that in nice, polite, academic terms complete with compound circular graphs said that the reason white people in some geographic regions voted agasint Obama was that he was black and the proof was that they didn't vote for him! Perfect circular logic!
It's the obverse of Catch 22.