What's up with McCain's flip flops?

First, he votes for the war in Iraq, like Hillary did. Then, unlike Hillary, when he starts campaigning, he says he doesn't have a problem with us staying in Iraq for another hundred years. Now, he is going around saying "I hate war". Then there was water-boarding. Was he ever waterboarded as a POW in Vietnam? Because the last time the issue was brought up for a vote in the Senate, he voted in favor of it? But, wait a minute...before that he was against it! Has this guy suffered some irremediable traumatic brain damage in his years of captivity in Vietnam? Is that why he can't seem to make up his mind from one minute to the next?