Saddam wasn't a threat? But he was certainly a nuisance there is no denying it. He did invade Kuwait remember? He didn't keep the promises he made after Gulf War 1 and he repeatedly massed his army on the border forcing the US into costly troop moving exercises. And the no-fly-zone thing was becoming tiresome.
Also Saudi Arabia was becoming a liability. It is after all the location of Islam’s holiest places and, hey, we respect that now. So a move into Iraq, setting up fortresses there was a good idea. Many birds were killed with this one stone. I counted at least twenty good reasons to invade Iraq. One of them was that you cannot insult the US and expect to live in peace - we have a reputation to keep.
All you mocking, lefty leaning, bleaters have got to get in your thick skulls the fact that there exists an Anglo-American Empire. It doesn't care a wit for your hand wringing protest marches and numbskull loony ideas of moral equivalence. It cares about wealth and security. It doesn't work at the intellectual level of a Marxist college professor but is altogether more primal.
Most of these "protestors" just do it because they like playing the part of protestor. Deep down they don’t care about third world poverty or justice. They don’t donate significant money to charitable causes or do anything practical. They depart the protest marches in their gas guzzling CSV's. They hate America because they have weird notions about all the ills of the third world and Latin America being caused by the Yankees. There are some genuine types who believe all war is bad and cruel and ugly and they are probably right in theory yet utterly impractical. The reality is that the West controls vast amounts of wealth and territory and this needs to be actively protected.
Non-democratic regimes are illegitimate if they exit for too long. There should be some international law that states that there must be elections after the rulers are in power for a certain period of time. Sometimes martial law is necessary for a time but all governments should work toward fair elections.
A thug like Saddam taking control by force and ruling for decades is not legitimate. It makes me laugh when they talk of Iraq as being a sovereign state as if Saddam was installed by a Deity.