I have to wonder about how many countries actually liked the US under Clinton. Kyoto was devised and pushed under Clinton (and killed with a 99-0 Senate vote under him too). Kyoto was pretty much all about slowing down the US economy. (If that wasn't the goal, why haven't the countries that did ratify it implemented it unilaterally. It's for the environment, after all).
I think the rest of the world hasn't liked the US for a while (certainly before the Wall came down), and are only now being open about it. I also think it won't matter who is president, Bush or Kerry. They'll be nicer about it - but the rest of the world is jealous of the US, and the man in charge isn't going to change that; since a) it's a structural thing, and b) Congress won't let him, because the country doesn't trust the UN. At this point, I don't see the benefit of bending over for the rest of the world. It won't get us enough benefit over what it'll lose us.