For Israel, foreign relations verge on existential concerns.
They have to do whatever it takes to survive and must be allowed to do so. If that means allying with Russia and/or nuking Iran, you do what you gotta do, or you won’t be around to contemplate ‘nuances.’ They may have already waited too long to deal with Iran.
You don’t need an ICBM to deliver a nuke. Those Gaza tunnels will do just fine.