That is the topic of my latest Bloomberg column, here is one excerpt:
Maybe Trump’s threat to attack cultural sites was not meant literally, but rather as a brash reminder that his retaliatory actions will not be constrained by world opinion, international law or the views of American elites. If so, such a signal, to be effective, has to harm the Iranian regime. Trump’s message shows that he doesn’t understand the calculus of retaliation very well.
Assassinating a military leader by drone, by contrast, is something the U.S. can do but the Iranian government cannot, at least not easily or without provoking even greater retaliation. That makes such a policy an effective deterrent in the short run, as it hurts the actual decision maker, and indeed that is what Trump chose to do.
By mentioning cultural sites, he in essence has decided to follow a very strong signal of action with a much weaker signal of words. If you are a hawk, you should understand that Trump’s talk of cultural sites is weakening his core message that retaliation will be effective. It is usually better game theory to follow up a highly impactful action with relative silence, but silence never has been Trump’s strong suit.
There is much more to the argument at the link.