Exactly what it says on the tin. With what POD could you get better Arab-Western relations after the fall of the Ottoman Empire?
No Balfour Declaration would help. Other than that, it would be hard, as the European powers essentially colonized the Arab world. A second PoD, where the United States, not under the super Communist-phobic Eisenhower, forces European acceptance of local nationalists like Mossadegh in Iran, etc, would help as well. If that happened, you might have the Arab world line up with the West in the Cold War.