Key point: Tehran likes to talk big. Iran could attack Israel, but they couldn't destroy it.
How might Iran retaliate for a U.S. drone strike that killed its most important general?
By attacking Israel.
A senior Iranian official has already threatened to strike Israel if America were to respond militarily to any Iranian retaliation for the death of Lieutenant General Qassem Soleimani, the chief of Iran’s Islamic Revolutionary Guard Corps (IRGC) Quds Force, and the driving force behind Iran’s network of proxy armies such as Hezbollah.
"If the US takes any action after our military response, we will level Tel Aviv and Haifa to the ground," said Mohsen Rezayee, Secretary of Iran's Expediency Council and a former IRGC commander, according to Iran’s Fars News Agency. The council advises Supreme Leader Ali Khamenei, and also has legislative powers.
Ironically, that would be the sort of strategy employed by Iran’s former number one enemy, Saddam Hussein. During Operation Desert Storm in 1991, Saddam fired 39 Scud ballistic missiles at Israel, in an attempt to provoke Israel into attacking Iraq and thus splitting the U.S.-led coalition of European and Arab states. The attempt nearly succeeded: Israel was barely dissuaded by U.S. pressure from retaliating.