I’d say from the Israeli perspective...which should be the
perspective of the west realistically, there are no “diplomatic” scenarios. Diplomacy to Iran is merely
a tactic to delay any military action. They have no intentions of stopping their program or giving up the quest
for canned sunshine. Diplomatic conversations with Iran
should only be undertaken by the west as a part of and
cover for other actions. You don’t argue with a rabid dog.
You might try to distract it while you grab your gun but the
ultimate goal is the elimination of the rabid dog.