i was just wondering. maybe if christianity was never invented, then islam wu d never have come into existence since it was christianity that first inspired prophet muhammad, though he was partly also inspired by Zoroastrianism. yet Zoroastrianism cant be completely blamed since they were still polytheistic to some extent and used to worship many Gods like Indra, Mirthras, etc. so christianity might as well have given birth to its greatest nemesis.