It matters if the reason for invading Iraq was supposedly WMDs that we knew they didn't have,
There's substantial evidence that he had WMDs up untill 1998. After that, he may had them, or not. Does it REALLY matter? He had them, he intended to use them, that's grounds enough.

he had connections to 9/11 which they knew he didn't have.
Maybe he did, maybe he didn't. I ask again, does it REALLY matter? Despite what American might think, Al-Qaueda is not the only terroristic organization in the world, and there has been a lot of terroristic activity before the eleventh of Septmenber, 2001. Iraq had supported, funded and generally sponsored much of that activity.

I would like people to list the terrorists that Saddam supported please
Hamas, Islamic Jihad, PLO, Hizaballah (with suport from Syria and Iran as well, Hizballah is a major org.), and many others. And if you're into picante details, Iraq even gave money to many families of suicide bombers, 10,000 dollars each.

Oh, and Talus - having those paintings in Saddam's palaces doesn't mean he had direct connection to the 911 events. It just means he supported and condoned them, along with the rest of the Islamic\Arab world.