Maybe I'm missing something here, but just what is it that the insurgents in Iraq want? (First of all, let's call them what they really are, terrorists). If what they want is for U.S. troops to leave, what good is it to blow stuff up? They have it all wrong. U.S. troops will leave when they STOP blowing up people and things. If the bombings in Iraq were to stop today, troops would begin leaving in droves within weeks.
If it's democracy that these terrorists really oppose, let me make a suggestion. If they would put as much effort into electing candidates of their choice as they put into blowing stuff up, they might really like democracy. They could even elect another ruthless tyrant, if that's what they want.