I would say a word or two about the Ottoman Empire and the so-called 'betrayal' by the Arabs:
Ottoman Empire would have collapsed--much like previous empires--including the British one in future--collapsed. And I have found Turks to be quite accepting of that collapse, even though they can be nostalgic for emotional reasons.
For Pakistanis here to defend that--only to stab Arabs--is also hypocritical: Why should a large number of people be subjected to an alien rule? And yes, put religion aside, it was an alien rule. We here cynically poo-pooh any Caliphate and then expect a few bedouin leaders to be accepting of the Caliphate.
That it lead to Israel was an unforeseen consequence. But how many people can say that the Ottomans would be around and strong in the mid 20th century? What would be the world like had there been no Hitler, no American/European 'guilt'?
We are going to speculate about these things till the cows come home. The reality is that, right now, forces outside of the region are benefiting from the internal divides in the Middle East. Those harping on the past are their willing-tools if they are contributing to the divides.
I'd say it is time for the region to act as one force, much like the EU does. And, as I see it, people in both Iran, Turkey and the Arab world are waking up to the new needs.