" Judaic monotheism had deeply penetrated Arabia for almost a century before Muhammad declared his revelation in 610 in one of the towns – Makka, or Mecca – in which those Himyarite emigrants had settled. It was precisely because Arabian monotheism (as distinct from the confusing three-in-one version preached by Christianity) had such a strongly Judaic colouring – was in effect Arab Judaism – that Muhammad, who had lived among Jews all his life, could assume at the very least a sympathetic hearing among them, even that they might be the most receptive of the population to his prophecy, not least the part about Islam being the true Abrahamic faith. "

― Simon Schama , The Story of the Jews: Finding the Words, 1000 BCE – 1492 CE