I hope we do not get to this point, but these countries all have war games software they anticipate all the various ways things can play out.
It did not work...
So Iran attacked massively. No hope of ever doing it again anytime soon. Even after Israel retaliated massively. So by playing the martyr they have one more chance....sorta.
But all the significant signatories to the Abrahamic Accords have already told Iran that they deserve everything Israel will dish back to them. They will not do anything to honor the Accords in this instance.
Iran has screwed themselves over. They have expended most of their munitions and are facing a massive retaliation ALONE.
They are going to be vulnerable to their own Kurdish population and those from Turkey and Iraq. Essentially they are toast very soon.
And NOBODY is going to care.