Well the thing is that Isreal already has them. You can only stop a country from having nukes before they get them. The reality is no one should have nukes, but there's no real way to have everyone disable them at the same time and have any confidence they couldn't just make them again. Every one who has nukes promises to never use them unless someone else nukes them first, but we all know that if it's a choice between being conquered and using nukes to stop it, promises are worth nothing.