Origins of the Judeo-Christian god and religion

I think that the concept of 'Satan' entered the Jewish religion via babylonian/persia actually.There also is a big difference in the concept of satan in the Jewish faith vs the Christian faith. In the Jewish faith, angels have no free with (Therefore no revolt, no fallen angels, etc etc.). Shaitan (or the accusor), is a servant of god that is supposed to provide for bad choices, so a person has the opportunity to choose 'good', and learn to live a sanctificed life vs a mundane life. He is more like the 'imp of perverse' than anything else.That is a big contrast to the Chrisitan concept.