The root cause of the Arab-Jewish hatred goes back to the time of Abraham, when he had a son by the Egyptian girl, Hagar. God promised a son to Abraham and Sarah, and Abraham thought that since Sarah was barren that Hagar might do.
Ishamael was not what God had in mind when he promised a son to Abraham and Sarah, and the children of Ishamael have been sick with jealousy and hatred ever since. They have been taught a hatred that consumes them. This is the root problem of this war in the Middle East.