How many people were killed in the Vietnam War and in the current war?
Estimates say that 2-5.1 million civilians were killed in Vietnam. And there was a democracy fighting in that war. In fact, our democracy uses our military than any other country in the world. Second problem with your example is Western countries (US included) supported Hussein and sold him weapons, even chemical and biological weapons. Had this not been going on certainly the level of casualties and the duration of the war would not have been as great. Certainly living in a democracy is much better, but it is flawed to say if every country becomes democratic that there will be no wars.