We have to rely on our historical memory. Israel took out Iraq's nuclear reactor precisely because she felt that a nuclear weapon in the hand's of Saddam was an existential threat. Had Israel not acted, the invasion of Kuwait would have had a very different ending. Nor should we forget the scuds fired against Israel by Saddam during that war, even though Israel was not envolved in any way. Today, we have Iran, led by an extreme, fanatical regime, which has declared on numerous occasions that it wants to destroy Israel. Iran is in fact Israel's most dangerous enemy since it arms, trains and funds all the terror groups on Israel's borders, and has a defense treaty with Syria. Iran is without doubt an existential threat to Israel.
Germany shelves Nazi crimes probe of US national Karkoc (AP)
from the article: Livni behind closed doors: Iran nukes pose little threat to Israel