He most definitely will be criticized and rightfully so
He accused American servicemen of mass murder and atrocities. His Senate testimony has come to light and it makes him look like a dope. It's one thing to be critical of government policy, but he went WAY beyond that. It goes to his judgement and fitness for office, which are certainly issues that will be raised, especially after this whole "Bush AWOL" fiasco. Copies of his long lost book The New Soldier are starting to appear on the blogsphere, too.
Politics is a blood sport.