The president may be a nut job, but the country is run by the aitollahs. Suicide by using nuclear weapons is unlikely. Giving bomb to terrorists unlikely as everyone dies with the bomb. Parity with Israel is achieved. The people to fear with the bomb are those who have used it or are unwilling to join the NPT. Who could that be?
from the article: Israel attack wouldn't stop Iran nuclear program, says U.K. study