If there is any truth to the following (via Ace of Spade and Doug Ross), I do not see how a catastrophic war between Israel and Iran is avoidable. Additionally, that war will probably include America and may also include Jordan, Lebanon and Syria aligned with Israel against Iran (such an attack as described in the link would almost certainly kill quite a few Jordanians, Lebanese and Syrians).
The world desperately needs the Iranian people to rise up and overthrow the Iranian regime. It also might be in the Iranian people's interest to replace the Iranian regime. As the Iranian regime seems to show no regard for the fact that such an attack might be greeted with a massive retaliation that endangers the lives of many innocent Iranian civilians.