roman religion

Jesus isn't born in 4 B.C., What religion(s) are anatolia and arabia for the next millennium? Is it Roman polytheism, one of the cults (probably Mithraism or Cybele), Zoroastrianism, or even Buddhism? And when the Turks start invading what religion do they choose to join in the absence of Islam?

Back when I researching religions, I read about Manichaeism, a rather fascinating religious movement that combined eastern and western ways of thinking along with it being a gnostic tradition, which is rarely seen in the mainstream West. However, what really grabbed my attention was that it was...