At the risk of putting ideas into the Ayatollah's head, whatever happened to the threat of assymetric warfare?
Put simply, rather than threaten those US assets near to hand, why not threaten mainland USA?
Given religious fanaticism and the promise of a slack handful of virgins, there are dozens of ways of shaking the mainland to the core. Even claiming to have poisoned water supplies or aircon [without lifting a finger to commit the act] might well cause panic and disruption. Wall Street, airports,rail and bus stations spring to mind.
It would outflank the feel good of toting a pistol around town and make many Americans call for Trump to mind his own business and desist.