Iran: It isn't about the nukes
Let's assume the worst case scenario: that Iran obtains nuclear weapons. If so, Iran could neither admit it and most certainly would never be able to use its bomb. Doing so, on Israel, Saudi Arabia or Western interests would present an existential threat to the Iranian regime and possibly to the country. While individual zealots choose to become martyrs, counties don't.
I know and respect people who favor the Iran deal, but am leaning against it-but not because of the bomb. I'm not afraid of the bomb.
Iran is a state sponsor of terrorism. I am concerned about tens of thousand of conventional missiles being launched by Hezbollah and other acts of terror which, collectively, could be as devastating as a nuclear attack but not evoke the same reaction by the works community. I am concerned about a dirty bomb - a large truck bomb in Tel Aviv in which conventional explosives scatter radioactive material.
A deal with Iran means lifting sanctions. Lifting sanctions means strengthening that brutal regime and its ability to wage unprecedented, conventional terror.