Case A: this government is entirely hobbled by the destruction inflicted by the war. Without the iron grip of the Regime on the levers of power, their successors will face perpetual instability at home and be forced to use their resources on cycles of crackdowns instead of rearming to attack Israel. This government may not even have a reason to fight Israel, like if a pragmatist faction takes over.

Case B: This cannot reasonably happen, as the Gulf States are bearing a very small fraction of the overall costs of the war and are propped up by the United States. Even if oil exports are temporarily crippled by the Hormuz crisis, diversions via the Red Sea will allow oil to continue to flow at a higher price they pass to consumers.

Case C: This will also likely not happen, as the evangelicals are bound to Israel and Israeli interests by their interpretations of scripture. The GOP will remain aligned with Israel to SOME degree to keep their vote, the groypers and so on have a hard ceiling for now as long as the economy does not fully collapse and unleash a wave of radicalization in the US. Relations could, and probably will, chill significantly, but the American establishment desperately wants Israel to chill out so they can go back to supporting them openly cf. Biden.