"I don't think it's true that most of the world supported the US in invading Iraq."

I don't think even Bush has claimed that to be the case. His line, as I understand it, is that someday these foreigners will realise that he was right all along; and also to point out that there are a number of foreign leaders who have been farsighted enough to see that already and help out, even though that makes them unpopular in their own countries.