Well, we know he has lots of connections in France and we know that they have had many reasons to go against US.
Also, we know that Kerry sent a letter to Iran when he became the Dem candidate and said he would want to establish relations asap.. There has also been the story of the Iran-Americans in court that have given a LOT of money to Kerry's campaign.
Just a couple to throw out there.
The Kerry campaign has received many $$$ in donations from known terrorist financiers.
Kerry's "supporters" (most folks already committed to voting for him) don't give a fig what he's done or will do. They just hate Dubya, Cheney, Rice, Powell and Christanity that they'll vote Kerry. No matter what.