The other thing everyone needs to remember is that Iraq is still a major source of the world's oil. Any war in that area is gonna effect oil exports. Extremists will attack any and all outgoing tankers. Be they from Iran, Kuwait, Saudi, or any other country in the region. The US might see the oil waiting for them, but the rest of the world is still reeling from a recession and can't afford to have major oil shortages.
Can all outgoing tankers be protected from a maniac in a explosive loaded zodiac or helicopter? And if Saddam decides to play an endgame and contaminate his oilfields, can we really get along without the reserves of oil that would be lost? Don't forget what he did in Kuwait. Setting the oilfields on fire. Think he wouldn't do that if he was losing?
The worst kind of fight is when the other guy has nothing to lose.