*shrugs*
I mean look, I am not a member of the Iranian government. But lets say I was, and the US has been attacking my country for months. I can't very well bomb Mar-A-Lago, but I'm not going to lose this war the normal way either.
My best strategy would be to take Trump right to the midterms and after he gets washed say "future US presidents should take this as a warning; we will end Trump's career, and we can end yours too."
That's the smart play. So they're prolly doing that.