They would be crazy to get nukes in a world where they would be the first targeted by pre-emption. The nuclear deal to prevent Iran from getting nukes was unanimous at the UN Security Council, at the European Union, and at the IAEA Board of Governors. The Arab world is scarred to death of Iran having nuclear weapons.
Why are you for it? Iran has 90 millions civilians to worry about. Israel has two millions Palestinian Arabs that are citizens of Israel. Do you care if they are blown up and the fallout drifts to the West Bank to poison them with cancer causing radiation?