User blog comment:GunsnadGlory/Religions/@comment-4727448-20121009025536/@comment-1630894-20121009030749

The whole "Islam existed since Adam, but died out and was revived by Mohammed" can pretty much be considered fiction to make Islam look like the one true religion that always existed. There's no proof that Islam was we know it, existed until the age of Mohammed, with the exact details of the religion not being put down until after the prophet's death.

The mother being a Jew thing was not around until the modern era. There have been historical conversions to Judaism, such as the Khazars.

Buddhism lost "mother India" in OTL, and nearly lost "adoptive China" too due to the harsh Chinese purges.

Powerful, colonizing Indian states could lead to Hinduism spreading beyond India.