Israel is not reckless enough to flush what ever is left of its international reputation by attacking Iran. It would only isolate Israel and confirm exactly why Iran may want nuclear weapons. If Israel was not so reckless in the Middle East AND did not posses nuclear weapons, i would be 100% again Iran probably wanting to build nuclear weapons. It would not be good if Iran develop nuclear weapons (we already have to much of them) but it will not be bad ether. I would trust Iran as much as i trust Israel with nuclear weapons. I think Israel is more afraid of losing power in the Middle East if Iran manage to develop nuclear weapons than a nuclear attack from Iran. Iran did not start a war for over 200 years so it have a much better record than Israel on that mater.
Palestinians, IDF clash in Jalazone after funeral of teen killed by IDF on Friday (Haaretz)
from the article: Medvedev: Israeli strike on Iran could spark global catastrophe