We have decided that the Shia are on our side and the Sunni aren't. I can guarantee that the "right" side will win a civil war. We may regret agreeing to ally ourselves with any of those groups of people, but it's what we've done and the group we have chosen are in an excellent position to keep the Sunni minority under their thumb.
Frankly I don't give a squat about Iraq. I am only concerned with the troops on the ground there. Their lives are what matters to me. In my own opinion, Iraq is not worth one of their lives. But, I support the men and women in uniform, no ifs, ands or buts about it. Iraq, I could give a care less about.