The 300,000+ Iraqi's in mass graves killed by Saddam's bloody hands in the last 5 years would probably have a one-sided opinion; and it would be logical!
Why is it logical to not add in the 500,000 dead from US and EU backed UN sanctions that impounded the 5 billions of equipment that Saddam bought to try to improve his drinking water system?
Could it be because the scale would swing the other way? Nahhhhhhh.... you would never think so...
But these aren't the critical numbers. Those will come in the future. If the US pulls out and leaves a power vacuum which leads to a long and bloody civil war that kills millions, then the argument becomes who caused it, and neither side will have a clear and convincing answer.