Dr. Hall-
Even according to those who believe that Iran was in compliance with their part of the treaty they were still developing destructive weapons which was fully legal under the terms of the deal- with access to billions of Dollars that they didn’t have access to beforehand.
Furthermore, the deal was only for 15 years- even if you believe that they weren’t violating the terms of the agreement do you think that they wouldn’t have LEGALLY pursued nuclear weapons once the 15 years is over?
By reneging on the deal and reinstating the sanctions President Trump has brought the Iranian leadership to the brink of financial collapse. Once the regime collapses the nuclear threat should be neutralized permanently.