Here's how the Iraq war's supporters logically lay out their case:

However, another Republican, Marty Woll, 56, a retired accountant from Los Angeles, said he saw a clear link between the war and attempts to combat terrorism. “Iraq was obviously not the precipitating location for the 9/11 attacks, but if you look at the Middle East as a whole, you see it has been spawning the most violent and the most desperate of the attacks,’’ Mr. Woll said. “Saddam Hussein killed almost a million of his own people. That magnitude indicated that someone had to do something about it.”

I guess you can't argue with emotion, which has been the only thing fueling this war since day one.  I'll never forget my former roommate, a GOP operative and Congressional staffer, who said that he couldn't wait to finally go after someone.