First, I’d like to say the word choice in your title is a bit unfortunate. To me it reads like you’re asserting that Iraqis are such that by their nature, they thrive on war. I realize you don’t mean this, but there it is.
Second, I think that whether the results of a war would be on balance better for the Iraqis than no war is very much up in the air. Those in favour of war seem convinced that the Saddam’s army will fold as quickly as it did in Gulf War I, and that the aftermath will quickly result in a government which will be good for Iraqis. Those opposed to the war seem convinced that both of these assumptions are hopelessly optimistic. They will point out that Saddam is unlikely to repeat the mistake of attempting large-scale engagements in the open desert, in favour of close in defense of the cities, where the landscape will largely eliminate most of the technological advantages of the US Army. Urban warfare conjures up images of Stalingrad, not the Falaise Pocket. They will point out that Saddam may in desperation launch biological or nerve agents against the Israelis (if, in fact, he has any), in a last ditch attempt to turn things into a larger Arab vs. non-Arab conflict after provoking Sharon into using his nuclear capabilities. And they will point out that in the absence of an iron fist military dictatorship, there’s a fair to good chance Iraq might erupt in a multi-sided civil war between Sunnis, Shias, and Kurds leading to widespread devastation, possibly inviting a visit from the Iranians, who would probably like to exact a little revenge for the Iran-Iraq War.
Now, since war seems inevitable, I fervently hope that those on the pro-war side are right, and that the war will be quick and Iraq can be stabilized under a decent government. However, I’m far from convinced that it is likely, and I think that launching this expedition thinking only about the best-case outcomes and ignoring the worst-case outcomes is horribly short-sighted, and, quite frankly, criminal.
If it turns out I am wrong about the likelihood of the worst case coming about, you will be free to say “Nyah nyah! You were wrong!” and I will respond “Praise be to Allah that I was.” But in any event, I trust that you can see why I think that a prolonged battle in Baghdad, wider war in the Middle East, a bitter civil war, etc, might not be an improvement over the status quo for Iraqi civilians.