Some thoughts on Arabs, Christians, Jews and Muslims:
It is interesting to note that the Arab political dominance of Islam lasted only 300 years or so, thereafter the Islāmic world was ruled mostly by non-Arab Muslims (Turks, Kurds [Saladin], Moors and the like) until at the end of WWI (1918) when the allies created the system of Arab controlled states at the expense of those Islāmic tribes and nations that commanded the Near and Middle East for the previous 1000 years.
Also, the Arabs like the Hebrews were Semite language speakers from tribes that migrated out of grasslands south of the Fertile Crescent during dry periods. Thus, ironically, not only do they share the same language family, original culture and genetics but also the same religion in some respects. Islam can somewhat be looked at as a heretical form of ancient Judaism since the Koran acknowledges the Hebrew bible as among its founding documents and Gabriel himself supposedly directed the Prophet to begin his vocation as a prophet instead of going into his family business selling souvenirs to pilgrims visiting Mecca. (This abandoning of the family business continues a long tradition among religious leaders. After all, Buddha could not stand being a prince, Jesus was bored by carpentry, Paul saw no future in tax collection and Joseph Smith needed the money.)
Similarly Christianity can be seen as a heretical form of Judaism. Christ, as a Jewish heretic, preached a different form of Judaism much as the Pharisees (another heretical group) did in creating a good deal of modern Judaism. Christ urged his followers to, “forget the forms and rules, how you behave and treat others is more important.” The rabbis (at least after Hillel) seemed to say, “the rules and prescriptions should not be taken too literally but they are a good thing to contemplate and discuss in order to determine how to behave.”
Paul the Arch-Heretic, on the other hand, demanded his supporters, “forget the Hebrews and what Jesus had to say, think, do and behave as I tell you.”