I remember reading this somewhere years ago. The idea is that Israel will nuke Paris, Berlin, London, etc, in the event that the west cuts off their support and allows it to be defeated by an enemy force.
Is this just a dumbass conspiracy theory, or is there something to it?
It's very unlikely that Israel has enough nuclear warheads or long range delivery platforms to hit very major city on Earth. Nuclear weapons are very expensive to maintain and iirc most of Israeli detergent is submarine based, which in theory means they can hit anywhere on earth given enough time, but in practice means that they only have relatively short ranged missiles and won't be able to hit any country with a competent ASW net.