From the below articles, I think we can all see several things.
1) The reasons given for starting a war with Iraq were later proven to be false.
2) This war has been one of the costliest wars in America's history, adjusted for inflation.
3) America not only maintained diplomatic ties with Iraq during its genocidal attacks against its own people, but our government actually provided support. This should defeat any claims of our "moral authority" and our concern for the Iraqi people.
4) America was instrumental in Saddam's rise to power in Iraq.
Note that none of these articles is new. I believe the newest one is over a year old. None of these articles come from the "fringe liberal left wing". The sources are the Washington Post, United Press International, CBS, and the United States Senate.