[GoLightly]

You're right about the Nestorian influence & I think there's also some Zoasterism thrown in for good measure.

Of course Judaism had a major influence, especially on the nature of the mohammedan god allah.

They pulled the founder of their religion from Judaism, the whole Abraham thing. They are the children of Ishmael, the older son born to Abraham. Ishmael was the son Abraham offered in sacrifice & his inheritance was usurped. The Jewish prophecies about the Messiah are meant for them.

[Enosh]

Ishmael was the son Abraham offered in sacrifice & his inheritance was usurped.

That's what the Koran says, not the Bible.

It was Isaac.

Genesis 22:2