I wonder at what trigger point Israel would begin to use her nukes in defense of a multi front attack that threatened its existence? Would it truly be after other means exhausted or on some strategy to preserve the last 40% or so of conventional forces and win? I mean rather than to take the attackers with them in an all lose local Armageddon.
My background was nuclear warfare. We were informed that Israel cannot afford nukes near Israel as she is a small territory, and any war where they will lose and another country takes their land results in nukes on the enemy lands.
So, a war breaks out, Israel responds, if overwhelmed then Israel uses nukes.
The problem is Israel is notoriously liberal. Liberals have a hard time unleashing nukes. Nukes need to be used decisively. I think Israel would use nukes far too late, if at all.