Duncan

“Like so many prophets before him, Muhammad never claimed to have invented a new religion. By his own admission, Muhammad’s message was an attempt to reform the existing religious beliefs and cultural practices of pre-Islamic Arabia so as to bring the God of the Jews and Christians to the Arab peoples. “[God] has established for you [the Arabs] the same religion enjoined on Noah, on Abraham, on Moses, and on Jesus,” the Quran says (42:13).”
― Reza Aslan, No God But God: The Origins, Evolution and Future of Islam