Issue is Iranian expansionism. That general had no business being in Iraq in terms of Bismarckian logic.
The second issue is that when you have the deep state with Pelosi bragging that they do not need to negotiate and have all the cards in hands, we have a case of war by crazies. The same applies to Iranian hubris.
Remains to be seen, but my bet is that Iran will not negotiate and continue its own hubris, while our warhawks will fall in the trap of making it look like the negotiation party.