The Abrahamic succession passed through Ishmael, not Isaac. The Hebrew Bible says otherwise only because Jews had falsified it. Christians had misrepresented Jesus. He was merely a prophet like others, not the Son of God. Jews and Christians should therefore, in principle, convert, but if they did not do so, they were to be spared as ‘people of the Book’, and allowed to live as dhimmi, citizens with less than full civil rights under Islamic rule and protection.
