Was going to mention something about this earlier, but never got round to it. Here's a different take.
There are two factions.
You have to take Abraham and Isaac/Ishmael story in the context of the times. The ruling powers of the time worshipped Moloch/Marduk/Zeus/the Bull, etc. The deity that demanded sacrifice of children.
Abraham was shown that God is other than Moloch. He does not demand sacrifice. It was a test of faith but also a confirmation.
Thereby distinguishing the true God from these pagan deities.
It is recorded that the Roman soldiers who sacked Jerusalem were astonished when they entered the Temple could not understand why the room was empty. No idols, statues, etc. Just an empty room for communion. A prayer hall. A place of meditation. Remember the prohibition against making images of God?
The Romans experienced cognitive dissonance in a big way. >>1875344