History is prologue and gives an inkling of how things will turn out - and once again I'll point to the crusader states which lasted while the Muslims were disunited but fell when they were united. Muslim polities could and did ally with the kingdom of Jerusalem and principality of antioch, as eg Jordan has helped defend the zionist entity. But the crusader states as the ze does relied on outside support, on an influx of knights not simply during the various crusades but between times too. The Americans in this comparison stand in for French and German knights. The Iranians reckon that the ze will be gone by 2040. I think they'll be gone sooner than that as the ability of the zionists to endure depends largely on American weapons and so they are hostages to fortune. With the Americans sending weapons to Ukraine and Taiwan, with the Americans thus far reluctant to move to a wartime economy, the zionists are imo living on borrowed time as at some point the Americans will need their production largely for their own forces. And whether Taiwan kicks off next year as I believe or whether it's 2027, at some point the supply of American materiel will dry up. And I think that'll coincidr with a greater unity among the Arab states who'll recognise that their interests are best served by removing the turbulent zionists.
The Hashemite entity is more of a client than a defender of the Zionist entity. It is a state where a majority self-identify as Palestinians, but one which sought to oppress expressions of Palestinian identity when it controlled the West Bank. After the loss of Jerusalem and the West Bank, rather than supporting the PLO it forced them further into exile during the Jordanian Civil War (Black September) in 1970. Jordan would lose its raison d'etre should there be a Palestine free from the "River to the Sea" with a neighbouring entity on the East Bank with a Palestinian majority.The Hashemite family do not want to return to Hejaz, and they wouldn't be welcomed by their Saudi cousins. As to the idea that other Arab states are going to unite to and remove the Saint Thomasesque Zionists, I can't see that happening, none of the current entities would want revolution on their doorstep.
Lebanon is in chaos and has been to varying degrees since the seventies. It's more likely to return to civil war with the militias of the ethnoreligious political factions fighting for supremacy each with support from their outside backers from Israel, Syria, Turkey and other neighbours. Lebanon also has a substantial Palestinian refugee population who are kept subjected and confined to refugee camps. Central to Lebanese politics is maintaining the marginal position of these mostly Lebanese born Palestinians. If given full civil rights they would give the country a clear Sunni majority which could destroy the flimsy current constitutional settlement.
The Alawite entity is much weakened, but still holds sway despite the attempts of the majority of the Syrian people to bring it down. Assad may not like the Israelis but his own state is an even less stable mirror image, as it is also built on having a religious minority having absolute political dominace. As in Palestine most Syrians are Sunni, but those with power aren't.
The Al Saud entity, a state where the power is in the hands of an, albeit fractious, family business, also don't want to see a country where the population decide their own destiny on their doorstep. The Eastern region of Arabia is their own internal Palestine. It has the oil and gas that has made the country rich and it has an often impoverished Shia majority which has suffered decades of religious and cultural oppression brutally manifested by regular executions and, during the uprising of 1979, the levelling of the historic centre of the city of Qatif. These are people who have no love of or loyalty to the central government. In addition Mohammed bin Salman, the current tyrant wants Israeli as an ally against Iran, and Israeli as well as Egyptian and Jordanian collaboration support to realise his Neom fantasy.
Egypt is happy to collaborate with Israel in controlling the Southern Border of Gaza, which is hardly surprising given that Hamas an offshoot of and is still closely allied with the Egyptian Muslim Brotherhood. Sisi and the Egyptian military came to power after overthrowing the democratically elected Muslim Brotherhood led government that followed the downfall of Mubarak. They went on to murder the former President and a lot of leading members of the brotherhood. Why would Sisi and his acolytes support a free and democratic Palestinian state where a branch of the Brotherhood would either share power or govern alone?
The Tehran theocracy faces substantial internal opposition and is more likely to be driven from power itself (although, I'm not holding my breath) than the Zionist entity is to be expunged. Should there be a second revolution in Iran, there's no reason to believe that a new regime would be as hostile to Israel as the current one claims to be. Iran is not an Arab state, but rather like Turkey and Israel one with a history of trying to keep their Arab minority populations oppressed.
In reality these states, with exception of Lebanon which is too fissured to unite internally let alone with other countries, can do business with a turbulent Zionist Entity, and they know that greater turbulence will lead to their own annihilation: they know what dominos can do.