What POD(s) are required to have (united) Palestine adopt confessionalism, instead of having it split in Israel and Palestine?
POD can be pre-1900 if it matters.
For example the different religious communities would agree that The President of the Republic should always be an Ashkenazi Jew, The prime minister a Sunni Muslim, the President of the national Assembly a Sepharadic Jew...
Would Palestine and the Middle-East be somewhat more stable?