The Arab lifestyle and social structure pre-dates Abraham and the Bronze Age. But Ishmael’s descendants eventually came to it, and that’s reflected in the duality of Arab society. The Qys Arabs do not intermarry with the Yemen Arabs, who maintain that they were the first, and that the Qys Arabs are Ishmaelites-come-latelys. Off and on over the centuries they have been sabotaging each others’ agriculture and feuding. Mohammed with a Qys Arab. This dychotomy has been significantly reduced since Israel reemerged for them both to hate.
Mohammed WAS a Qys Arab. Wish autocorrect would butt out.
I think it is very unlikely that any of Ishmael’s descendants lived as far south as Mecca. That we are told that Ishmael was 13 when he was circumcised probably reflects local tribal practices in the area where his descendants lived (circumcision as part of the initiation process at puberty).