Your argument assumes that no country would welcome a foriegn invasion.
What if you lived in a country where you had virtually no rights and were invaded by a country whose presense would insure you with many rights. Would you fight those invaders?
I do see where you are coming from, but for me nothing justifies the death of 60,000/600,000 [depending what report]. Also, I do not for one minute believe that the US/Coalition forces really had any good intention of "liberating" anyone. Why did the US never go into South Africa and liberate the blacks who had minimal rights? Why not liberate the North Koreans? The Burmese?
America gets attacked and loses 2,000 odd lives, so they feel the need to attack 3 other nations, kill 60,000+ ppl for a period of 5+ years and everyone understands why they "fight back"....but Iraq is supposed to get attacked and sit and smile wildly, I just don't see it. It is the principle for many, patriotism is not restricted only to Americans, or people from prosperous nations. Anyone invades my country, for any reason, I will in fact be pissed. Just my opinion of course, but thats how I would feel.