Until definitive proof shows that Saddam 1) is harboring WMD for the purpose of terrorizing his neighbors, or 2) is linked to and supporting Al Qaeda, then my answer is "no".

BTW, I don't think Dubya is doing this for oil. If he were, he would be attacking Venezuela instead of Iraq. Instead, I think he's doing it partly because he thinks its necessary to protect the U.S., and partly for political gain -- he's got 2004 (and the memory of 1992) on his mind.