The Iraq war is fully justifiable without proving a pre-9-11 affiliation between Saddam and al-Qaida. It is also justified with or without WMD.
Saddam had the motive to do us harm, a proven history of belligerence toward us, after 9-11, a template to emulate, and the money to finance a clandestine attack. We had to take him out whether he was hangin' with Osama or not.