Those two indivduals who, among others, planned and ordered the deaths of Americans weren't low level expendables.
Neither were our people in Beirut, Iraq, and Afghanistan who were murdered by the Islamic Iranian Regime run by the black robes.
And yes, the Houthis who were engaged in attacking Americans did, indeed, have Iranian QUDS Forces advisors, rendering them enemy combatants and therefore, legitimate military targets.
Both The United States and Israel have provided years of warning to the mullahs that they would be bombed in the event they continued building nuclear weapons; warnings which they chose to ignore in continuation of their pursuit of nuclear bombs and ballistic missiles with which to deliver them.