In the hyper specific instance, Iran just yesterday made a failairly de-escalatory gesture when Khamenei implied that Iran would not directly retaliate for Nasrallah’s killing and would instead let it's proxy Hezbollah respond.
Admittedly that's a fine distinction, but there's subtle call and response diplomatic language being spoken here. And that was diplo-speak for "we're willing to let cooler heads prevail".
To which, less than 24 hours later, Netanyahu replied "Oh, we're going in on the ground in Lebanon" which is diplo-speak for "damn the torpedoes!".
Not really sticking up for the Iranian regime since they're a bunch of terrorist fuckwads, but Bibi seems hell bent on putting out the fire with gasoline.