PJB, as usual, is directly on target with his analysis.
One of the questions that is diligently being avoided by the administration as they wade into this quagmire, is what happens to Iraq when Saddam Hussein is topple? Who will be the useful idiot installed in the puppet government? Who will be the Imelda Marcos of Baghdad and how many pairs of shoes will she buy?
All that will happen if we actually do invade and occupy Iraq is that we will become the focal point of unified hostility for the Muslim world. (as if we aren't already.)
Frankly, I have no love for Saddam Hussein. And if it's necessary to wipe him out to defend our National Security, I have no problems with vaporizing Baghdad in a nuclear plasma. Let the barbaric heathens rush into the vacuum and fight among themselves to claim and rebuild the territory. But keep us out of trying to "liberate" Iraq and engaging in "nation building". Been there, tried that many, many times. It doesn't work. Only leads to greater hostilities.