Why would you have said no? We went into Iraq to prevent another 9/11, not to free the Iraqis. Having a free Iraq is part of the solution; it would be a waste to go into Iraq, remove Saddam, leave, and let another terror-sponsoring madman rule in his stead.
As I said, we went there to establish a presence and Hussein was the easiest to eliminate without enflaming the whole region. I know that, but we weren't sold the War on that premise. And now, the premise that we were sold the War on has taken a huge body-blow, and will be hard to make whole should we have to.