Saddam has started wars that killed over a million people
Over 4 million Iraqis have fled the country into exile. Tens of thousands have been killed by Saddam's thugs, and some estimates are at least an order of magnitude higher. There is ample evidence that he has used chemical weapons, including killing thousands of Kurds who live in Iraq. Furthermore, Saddam has reneged on complying with the Oil for Food program, using the money to build scores of presidential compounds while letting thousands of children die every year. If he hasn't killed as many people as Hitler, it's only because he had a smaller population base to murder.
If you can't see that, then you're blind to the historical evidence and there's little point bothering with you.