As I recall, the justification of the Iraq war had four parts.
- Iraqi WMDs
- Connections between Iraq and Al-Qaeda
- Bringing democracy to Iraq would fight terrorism.
- Humanitarian reasons.
I won't bother to address the first two - if you still think either of them passed muster, you need to watch less Fox News. As I noted before, there is no good evidence for the third one. As for the fourth one, the Lancet Study has documented the humanitarian nightmare that came out of the war: Iraq has a higher rate of death under the American occupation than under Saddam. The excess is the equivalent of (best estimate) 100,000 extra deaths for the first 18 months of the occupation, with the 95% confidence interval ranging from 8,000 - 200,0000.
So, yeah. Are there any justifications left that a reasonable supporter of the war can still cling to?