I never said it was "exclusively" eastern. I objected to your point that it "rose in the West" -- Christianity "rose" in Asia, spread to the West but for much of the early centuries the "action" was in the East
Christianity is not "exclusively" either Eastern or Western even though it arose in the East.
“Christianity “rose” in Asia,”
Could you not say it just as much rose in Rome? There were believers in Rome, apparently quite a going concern, for years before Paul’s death.