The French and the antiwar apologists such as
Yes, we risk an environmental disaster, as well as casualties among innocent Iraqis (though I question whether there are any such; by not rising up and throwing Saddam out, it can be argued they brought it on themselves). The blame for those can be laid squarely at Saddam's feet. If he'd disarmed, as he agreed to in 1991, none of this would be necessary. We cannot let more of his potential crimes against his own people and the environment to dissuade us from doing what must be done. If we do, he wins.
As for following the rule of international law, it's broken down. Any law must back up its pronouncements with effective means of enforcement. There are no such means here, as the UN has plainly refused to put teeth into its 17 resolutions on the subject.
I'd have posted this to