AHC: Have Pan-Arabism succeed

Your challenge, with a POD after 1945, is for Pan-Arabism to become a successful political movement with a single united Arab nation controlling at least a majority of the Arab World by 2019.
 
Prevent the Arab front in the Cold War somehow, so that the West is not so committed to subvert any attempt at Pan-Arabism (seeing it, basically, as a cover for Soviet/Communist influence) whenever it emerges.
A lot could be done if the armies do not acquire the OTL political prominence in so many key Arab countries (critically Egypt, Syria and Iraq) with Arabist discourse used to legitimise the rule of authoritarian (somewhat) leftist military officers.
Unfortunately, I think 1945 is too late to reach a peaceful solution to the competing Arab and Zionist claims over Palestine that both sides can accept (this was probably possible, albeit increasingly hard, in the Interwar). The First Arab-Israeli War was highly traumatic for Arab societies and greatly contributed to shape Pan-Arabism toward its militaristic bent (Arab victory there, besides it low probability, would also do relatively little for the Pan-Arab cause since it legitimises existing Arab regimes, largely conservative ones).
 
Prevent the Arab front in the Cold War somehow, so that the West is not so committed to subvert any attempt at Pan-Arabism (seeing it, basically, as a cover for Soviet/Communist influence) whenever it emerges.
A lot could be done if the armies do not acquire the OTL political prominence in so many key Arab countries (critically Egypt, Syria and Iraq) with Arabist discourse used to legitimise the rule of authoritarian (somewhat) leftist military officers.
Unfortunately, I think 1945 is too late to reach a peaceful solution to the competing Arab and Zionist claims over Palestine that both sides can accept (this was probably possible, albeit increasingly hard, in the Interwar). The First Arab-Israeli War was highly traumatic for Arab societies and greatly contributed to shape Pan-Arabism toward its militaristic bent (Arab victory there, besides it low probability, would also do relatively little for the Pan-Arab cause since it legitimises existing Arab regimes, largely conservative ones).

Honestly, by the time the British and French had carved out the Middle East, it was already too late.

One way to let pan-Arabism succeed, might be to let Hussein ibn Ali be Caliph, ruling over Hejaz and the Arab lands of the crumbling Ottoman Empire, while leaving its non-Arab lands and those Arab countries not part of the Ottoman Empire alone, under mostly French influence to compensate for the sheer size of this new Hejazi-Mashriqi polity; this Hashemite Caliphate would nonetheless become the dominant Arab power, and with the end of colonialism the rest of the Arab world will gravitate towards it, due to economic and religious reasons. There won't be a single pan-Arab polity, but if there will be an equivalent to the Arab League in this world, it will be much stronger, kind of like an European Union with Egypt and Greater Syria as its France and Germany, and the Gulf states as the filthy rich Luxembourg equivalents.
 
Israel would probably be a weird obscure history topic about a failed Jewish state in Palestine.
 
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