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alternatehistory.com
Briefly, the historical Jesus:
Was regarded as being a successor to the prophet John the Baptist
Was briefly active in the territory of Herod Antipas after the latter had John executed
Moved to Roman-held territory and was acclaimed (presumably by followers of John) as 'King of the Jews' - commonly used as Herod''s title
As a result was arrested and crucified by Pilate. (I think it highly possible that Pilate did have the title nailed over him. That is exactly the sort of dickish thing that the historical Pilate would do)
Almost immediately, a belief arose that Jesus had ascended into heaven (as the deified Ceasars did) and/or would shortly return to take up his reign on Earth. Early Christian theology had to deal with the reality that the latter did not happen.
Now imagine a different Jesus, whose history is the same up to that last week in Jerusalem. This Jesus is very much determined that his kingdom is of this world. He either avoids or somehow survives crucifixion, and bides his time until he has the opportunity to become a second David.
How does he do it - with no more miracles than the OTL Jesus had at his disposal?