I don't believe that there is a diplomatic solution with those who are willing to blow themselves up in order to kill Americans. I do believe that other "friendly" countries have much to blame, but Iraq is the center of any global threat at the moment.
Don't we see the potential here, the risk? WWIII - US [and Tony Blair!] v. the World?...
I believe that should we do nothing, WWWIII would be eminent.