That is the point. The man is a liar. He doesn't "fudge" or shade things or do nuance. He just lies.
BINGO, we've got a winner! It's nice to hang Obama with is own words.
Does he lie, or does he think that when reality conflicts with his belief, the reality is defective?
As a former liberal, I am serious when I ask the question. Looking back on how I used to think, deviations from 'the vision' were bad and should rightly be corrected; there was no question of whether 'the vision' was attainable. More to the point, while 'the vision' as a whole was clearly a good thing, there was no question of whether the subset that would be attainable would be desirable without the subset that would not.
Obama may be an evil liar, but he could also be a deluded 'useful idiot'. Neither is what we should want in a leader, of course, though knowing Obama's true nature would be useful in trying to oppose him.