"...but the things going on in Iraq now are even worse than the things that he did."
That part of your so-called question I disagree with. It is terrible, but thousands and thousands of people died under the dictatorship and many more would be dying today if he had remained in power. Still, we all know the situation is miserable. There is a power vacuum and an on-going civil war.
Bush doesn't pull our troops because ...
1. when we leave the ENTIRE middle east will be at war with each other and probably Israel. Millions will die.
2. if these tribes war on each other across national boundaries, we will not have the oil to sustain our economy (I do not believe we intervened in Iraq for oil but I do believe it is totally ironic that we may have to stay engaged in the mid east in order to protect all oil supplies)
3. if the mid east comes apart ...our enemies WILL follow us. It will be only a matter of time.
Not a pretty picture. I think we have totally mishandled Iraq until now, but I fear for what happens if (when?) we pull out. I am afraid we have the tiger by the tail.