Splitter, as promised, here you go:
http://www.globalsecurity.org/wmd/wo...l/doctrine.htm
After reading the document you should realize that Israel is afraid of the existence of a nuke in its neighborhood because it would cross it's defense strategy.
No one thinks the Iran would nuke Israel.
But:
If there was a conventional war, and one or more of the involved nations has access to nukes - NO ONE can use them.
It's a nuclear pat.
And that is what scares the shit out of the Israelis, they would have to rely on conventional warfare to defend themselves - and most likely fail.
But there still the Samson Option...