alternatehistory.com

What is the possibility that a combination of Islam and Christianity could become popular- at least as popular as, say, Mormonism? By a "combination" I mean that they believe that the Old and New Testaments as well as the Koran are Holy Books, that Jesus was the son of God, and that Mohammed was the Seal of the Prophets. They'd probably think of themselves as both Christian and Muslim, though the orthodoxies of both religions would condemn them as a heresy. The main two ideas I think might work is that in the early days of Islam, local beliefs might get assimilated in certain places- I don't really know where hotbeds for heresy might be, though. The second idea is that from the 18th century onwards an African syncretic religion might evolve. I know that "Chrislam" is a thing in Nigeria OTL, but perhaps it could get more successful?
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