The Torah is centered around the idea that the descendants of Abraham are the rightful residents of the land of Israel and the religion they follow is the one true faith. Their law code comes from Moses and the land is granted to them according to divine covenant with Yahweh. But according to the Bible itself Abraham came from Babylon and the Law Code was written in Persia. And maybe, just maybe, the entire story of Abraham and Moses were written to provide Jewish pedigree for Persian ideas.