By ICBMs were talking about missiles only not nukes - the delivery system. Israel has not test fired any ICBMs and you really need to test fire those rockets to see if they are working, etc. You can't just build a missile and know it will work without test firing.
The rest of your comments are irrational fantasy land type scenarios.
Who can say what will really happen... I’m pretty sure Israel will nuke Russia/Moscow/St Petersburg if it has nothing to lose. You would too if you had any balls
Israel has 200-300 nukes. You better believe they have means to deliver them via Samson option retaliation