In order to legitimate and govern this unexpected new empire, the faith of Islam was contrived and promulgated through the figure of Muhammad and the Koran. A compilation of Arabian war history and doctrines and new governing rules was given a gloss of pagan and marginal, heretical Christian beliefs and called a holy book as a way to displace competing sources of authority.
Fascinating take on this.
Ishmael was described as a wild man
and he would be at Odds with all.
So it is Written, so it shall be done
.
(I’m binge watching THE TEN COMMANDMENTS)