Wow, I could go for pages on this one.
However, to generalize, a large contingent of the Muslims (doesn't matter what muslin middle eastern country, it's all of them) believe the US is the Great Satin, Israel even worse, and the US is doing Israel's bidding.
With Iraq we have a base of operations, usable ports, and large contigent of Armored forces capable of striking at any of them.
We have their attention!
State sponsered terrorism is going to be at an all time low as long as they believe we are will to take them out if we think they're guilty.
So I think Irag was and is worth every cent, and was done to perfection (as much as a military action can be).