A balance of power would force Israel to become less aggressive and more sensible, and be part of the region. The vast majority of the Iranian people hold nothing against Israel. Israel is is the least of their problems. And unless attacked by Israel, Iranians have no interest whatsoever to attack Israel. Also the fact that Israel also has nuclear weapons will deter anyone from attacking it.
Army: Blast in Korean DMZ wounds two South Korean soldiers (Reuters)
from the article: Iran nuclear bomb could bring military balance of power, expert says