Egyptians are not truly these Arabs, nor are people from the Maghreb or Syria or Iraq. The Syrians and Iraqis are Semitic yes, but descendents of earlier Semitic incursions. The Maghreb people are a mix of Berber, Greek and other European and Arab.
Half the Arabic speaking people on the planet live in Egypt.
Just to be clear, Jewish tradition regards Ishmael as the archetype of Islam (and Esau/Edom as the archetype of Christianity).