Even if the Iranians have a nuclear weapon or two, the Israelis have had them for over 50 years. Use of a nuclear bomb would be suicidal on Iran’s part unless they expect Russia and China to threaten Israel and the West with all out nuclear war. This is what used to be called brinkmanship. My guess is if Iran goes rogue, Putin and Xi will walk away. But if Iran and its proxy, Hezbollah, attack Israel, the Russians and Chinese will warn Netanyahu and Biden and his handlers that if Israel or the West go nuclear, they will respond in like manner.
” Use of a nuclear bomb would be suicidal on Iran’s part “
You mean like a suicidal bomber. This is a country that supports suicidal bombers.