Both religions and cultures descend from Abraham. Jews believe they are descended from Issac, son of Abraham, who was supposedly the promised son, who would inherit Abraham's blessings, while Muslims believe they are the descendants of Ishmael, Abraham's other son and also the son of the slave . woman. Since Isaac was the promised son and Ishmael was the son of a slave, it was inevitable that there would be a conflict between Jews and Muslims because they both believe that they are correct and that they are the chosen one.