They say history is the best indicator of what is likely in the future. Israel has been in survival mode since 1948. They have been targeted by every country in the region, and have had to be very proactive in responding to threats.
In 1981, Israel bombed the Osirak reactor 18 miles south of Baghdad.
In 2004 Israel sought US made bunker bombs.
http://www.commondreams.org/he...0.htm
In 2007 Israel was accused of bombings within Syria. This was supposedly a reactor, but Syria quickly cleaned up the mess before the world could see it.
http://www.nytimes.com/2007/10....html
Iran has already expressed a desire to use nuclear weapons on Israel. If a country indicated that they were intending to Nuke the US, do you think we wouldn't respond in a proactive manner.
Israel is in survival mode, and I expect them to do what is necessary to survive, including a surgical attack. They have no choice.