Iran has domestic uranium deposits. They design and build their own centrifuges, and had thousands of such centrifuges during the JCPOA. It's basically impossible to denuclearize them or prevent them from building a rudimentary reactor or bomb, and it has been that way for at least two decades.

Diplomacy was a proven path to prevent Iran from reaching for nuclear deterrence. The plan worked well for America and Iran, which is probably what motivated Likud to escalate the situation and force them both to pick sides.