What you're referring to as the "Bush-can-do-no-wrong crowd" is actually the "Actually-read-the-report crowd" as opposed to the "don't-bother-me-with-the-facts-because-I-hate-this-man-and-want-to-trash-him crowd."
You miss the point of this controversy completely. Bush by admitting to the Enviro-Nazis that the human race is responsible for global warming he has unwittingly given the moral high ground to these nut jobs and put himself in a position where he can be attacked relentlessly for not caring about the environment even though he knows better. In sum, he has handed over his ammunition to a bunch of whacked out anti-capitalist extremists and you can bet that they will use this ammunition to force one costly concession out of Bush after another. Bet on it.