First only Israel has a plan. Rubio, and Johnson agreeing that US was forced to follow Israel, and even Trump calling it "the last best chance" desperation is all pure subservience to Israel's orders.
Israel has as little interest in a functioning democratic Iran, as it does in its Lebanon and Syria control operations. A dysfunctional weak state in chaos is one that cannot object to more Israeli genocide/warmongering.
Gulf States, US allies, being weaker and potentially failing is also to Israel's advantage even if US suffers. It means zero moral concerns and impotence to total evil.
The trap for Gulf states is to blame all internal rebellion on Iran is the perfect cover for Mossad operations to destroy them.
The fall of Gulf states, and complete contempt for their protection by the US, does have US advantages. EU is programmed to just buy more US energy, as a result of US initiated wars. Every threat to EU by the US is propagandizes as an attack by Russia.
Even if Israel is weakened by the war, that rest of Gulf is weakened more, is the plan that assures ultimate victory.
A denuclearization of Iran is a threat to the plan, and why Trump overturned the first one. Mediators declaring significant progress prior to start of war, belies the pure US servitude to Israel only plan.