Unprovoked attack? You must be sleeping. The fact is the fanatical Islamist-Jihadist regime of Iran has repeatedly threatened to obliterate Israel. Presently, they are feverishly working on their nukes so they can carry out their evil plans. Israel has every right to defend itself against the fanatics' Mushroom Cloud. You don't wait for the Mushroom Cloud shower. You preempt it from happening. Those who advocate Israel to wait for a Holocaust to happen as a sitting duck are no better than Hitler's henchmen.
Netanyahu condemns West Bank arson attack, calling it 'terror' (Haaretz)
from the article: Israel should heed Obama's warning not to strike Iran