I would also point out that the Old Testament was about the designation of specific part of the world for the Hebrews/ Jews. All the stories in the Old Testament are about gaining, retaining and losing that specific piece of land. Christianity rises with the loss of the Jewish homeland. It retains the message of justice from Judaism while discarding the claims of an exclusive homeland. Islam retains the tribalism of the Old Testament and rejects the idea of "welcoming the alien into their midst", claiming the whole world for itself and demanding the exclusion of those that do not adhere to its tenents.