Can you imagine the effect of an Israeli air strike on the oil port of Bandar Abbas, destroyinf both the port facilities and all oil tankers in or near the port? This, of course, would have to be accompanied by an attack on Iranian (and Hezbollah) missile sites). After that, there would be no need to destroy Iranian nuclear sites.
UN: Gaza could be 'uninhabitable' by 2020 if trends continue (AP)
from the article: Hezbollah: Israeli attack on Iran would set Middle East ablaze