Concepts which were added to the Jewish religion during the exile:
1. Satan as being in rebellion against God. Prior to the exile, Satan was a tool of God used to chastise his disobedient people. Compare 1 Chr 21 with 2 Sam 24, the story of the census. They are identical passages, except what 2 Sam identifies as the wrath of God is identifieid in Chr as Satan.
2. A distinct "paradise" vs "Gehenna"/Tartarus.
3. A hierarchy of angels.
I'm not sure what the writer means by saying that the Jewish concept of "soul" comes from Z; Angels plainly are mentionned prior to Z., but their nature may have been greatly defined by Z. for all I know.
Christians whould not be scandalize to find out that the faith has roots beyond simply Abraham; the creation account is a sanctified version of what was believed by the people of Ur. Inspiration allowed the Jews to see the myths of the world around them in a holy way, and to recognize the truths among the half-truths and lies, but direct revelation occurred only with Jesus.
So, the 10 Commandments presented to Moses were not a direct revelation? The Preservation of Noah, his Kin and the animals, not a direct revelation? Serious question here, no flippancy intended.