Muhammad was a prophet sent down from god, he was sent to spread the message of Islam the true religion. He didnt believe that only Arabs would go to heaven but he believed that any body who was muslim would go to heaven. He also did not believe that god was defeated by Satan, but instead knew that god created Satan to drive people from Islam and test them on wether they would break there belief or keep a strong faith and worship only one god Allah. Islam was not a new religion it has been along for a long time. god has been sending prophets to different places at different times to spread the message of Islam and worship only one god.
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