This is an interesting article.
http://content.nejm.org/cgi/content/full/360/16/1585
Make what you will of the total deaths but even these folks list 47% of the civilian deaths in Iraq by execution after capture (most tortured) and suicide bombers.
And America is such a bad country? Some presidents think so.
"....... Weapons that kill relatively high proportions of Iraqi civilians, female civilians, or children are particularly hazardous to public health. ......"