The indigenous population were not Arabs. You still have not answered this question—-
Since the invention of Islam, Arabs have a historical track record. Egyptians were not Arab, nor did they speak Arabic. Syrians (Assyrians) were not Arabs, nor did they speak Arabic, Moroccans (Berbers) were not Arabs, nor did they speak Arabic, Iraqis (Kurds, Assyrians, Armenians, Azides, etc) were not Arabs nor did they speak Arabic, Libya was not Arab, nor did they speak Arabic, the Sudan (tribal Africa) was not Arab, nor did they speak Arabic, Tunisia was not Arab, nor did they speak Arabic. Why are they all called “Arab” Countries, Arab States, belong to the League of “Arab” Nations, and have to live under some form of Islamic Sharia, which is Arabian?