A smarter person would weigh the repercussion of assassination against maintaining a messed up status quo. Trump decided to poke something snarly with a stick. I have no clue what the Iranians will do, but it won't be good. It would make more sense for them to do something personal against him (well, it's not the country, it's Trump and his collection of sycophant assholes), and avoid war, but who knows what's going to happen