Many who are not of my political persuasion might wonder why this issue of Iraq seems so important to me. There is the obvious one of unnecessary deaths. (Which I believe should be compared to the war in Afghanistan, which to mind mind did indeed seem necessary, as there were active terrorist training camps there working to kill Americans, and that government particularly decided not to shut them down. Those innocent deaths were likely necessary.) Let's take that as obvious and move on.
The other big issue is what the Bush / Rice foreign policy has become. Essentially, the motivation for the invasion of Iraq is that the administration thought we would ultimately be better off with Saddam gone. There is a solid chance, though only a chance due to the dubious reconstruction, that they will be right. But is the possibility that we would be "better off" a valid justification for war? This is not an issue of imminent threat. It is one of thinking that that guy I hate might do something some day which is bad. Compare "might do something some day which is bad" to the Iraqi death toll. "Better off" is a foreign policy with no limits. It is like "enemy combatant". Anyone can be an enemy combatant. The "better off" Bush doctrine says we can kill anyone we want if it is to our benefit. Think about that and convince me I am wrong, because I want to be. But how are we to lead the world, other than through economic might and fear, if this is our true foreign policy? It gives up everything we are supposed to be fighting for.
Here is an analogy.
Man stabs another man with a knife 12 times.
Justification 1: "He was trying to kill me with his own knife." - self-defense, justified.
Justifiation 2: "He was attacking my wife." Not self-defense, but likely justified.
Justification 3: "He attacked my wife last week and was planning to attack her again tomorrow. I have evidence and stated intentions." Wish there was another way, but we understand.
Justification 4: "Someone else attacked my wife, but I really think this other guy is up to something. I mean he is a really bad guy!" Obviously wrong.
You may fill in which world situations are which.