I agree with the guy saying it's nor malice, but I don't think it's exactly ignorance either. I think it's saying what needs to be said to win, the same as any other candidate for public office does.
And I still stand by my vote for Obama, even though I recognize that many things that were promised aren't happening (some of them haven't happened yet, but may still), and that some of his goals don't line up with what I believe is right. I stand by it because I believe that McCain would have been no better, and in fact somewhat worse. His stumbling over dealing with economic issues (before and after the meltdown), his commitment to the bailout, and his selection of Sarah Palin as running mate (who is a serious amplification of all the worst qualities of Obama, but with different political ideals, e.g., worshipped by her following but has very little experience) showed me that although Obama was very much not ideal, McCain was very much worse.