Both religions and cultures are descended from Abraham. Jews believe that they are descended from Isaac, the son of Abraham, who was supposed to be the promised son, who would inherit Abraham's blessings, and Muslims believe that they are descendants of Ishmael, the other son of Abraham and also the son of the slave. women. With Isaac being the promised son and Ishmael being the son of a slave, there was bound to be conflict between the Jews and the Muslims because they both believe they are right and the chosen one..