I’ll point out that your list consists of separate arguments. Some people point to the evidence Saddam had chemical weapons because they believe we found stocks of chemical weapons he’d kept even after using some on the Kurds, not because they think we should have overthrown him. Those are two separate statements—-one is a question of fact and one an opinion.

Still other Americans initially opposed the invasion but believed that, having overthrown the government, we had a moral obligation to stay, develop the istitutions of the country, and prevent sectarian violence from breaking out again. I was in this camp back in 2006.