If Hizballah, Hamas & the Assad régime were neutralized, the Iranian Shi'ite dictatorship would/will be standing alone without terrorist allies.
The Iranians are running around organizing their proxies (Hamas/Hizballah plus Shi'ite thugs in Iraq & Afghanistan, for all out regional war, in which Tehran will actively and publicly participate, before their terrorist proxies are decimated by Israel's armed forces.