Saddam Hussein opressed his people with an iron fist comparable to that of Hitler and his Nazis.
Saddam Hussein supported the Palestinian terror groups such as Hamas, Islamic Jihad, and Yasser Arafat himself who kill innocent civilians (both Israeli and Palestinian) and then whine about Isreal. Saddam may not have been connected to the attacks of September 11th, 2001, but he did have ties to Al Queda and trained and funded various Al Queda terrorists. This inhcluded Ramsi Youself, the mastermind behind the 1993 bombing of the World Trade Center.
True, the US supported him when Iran became an enemy, but that was under the principle of "The enemy of my enemy is my friend." But during that era, Britain, France and Germany also supported him, as did Russia and China, so claiming that he was put into power by the US and that the US alone supported him is completely and utterly false (this goes double for the leftists and euro-whiners complaining about the issue here and not doing any real research to get the facts).
Saddam Hussein used the UN's Oil for Food program for his own ends, starving his own people and France and Germany opposed the war because they had huge oil investments with Saddam Hussein. If the US was really after the oil, we would have simply bought it from him instead of going through the trouble of invading (once again that goes double for the clueless europeans and liberals).
Saddam did have weapons of mass destruction. He gassed his own people and refused to disarm them despite a TWELVE YEAR EFFORT by the to pressure him into disarming. Right now, the American and Polish forces are regularly uncovering nerve gas that he was supposed to destroy.