It's interesting to note that nowhere in President Bush's book, nor in any interview that can be verified, has he slammed McCain for picking Sarah Palin. Nor has he blamed Sarah Palin for McCain's loss. What he has done is blame McCain for McCain's loss. That doesn't fit nicely into the leftist meme that Sarah Palin was to blame so they naturally went and made crap up.
I think they seem to think that the internet doesn't exist.