>>511231610
Zoroastrianism huge Biblical influence after the Babylonian Exile. The Bible even calls Cyrus the Great the Messiah for the time. Satan became a stand in for Ahriman and Yahweh for Ahura Mazda. Angels and devils have a massive battle in Revelation like the Asuras and Divas do in both Zoroastrianism and Hinduism. Before this Satan was loyal to God in Job and the serpent in the garden of Eden was just a talking snake. An Enki left over from Sumerian mythology. First non-Indian Buddhists were descendants of Alexander the Great's army who stayed in Persia and India.

I don't know what the rules were of the Sol Invictus cult was. But even that seeped into Christianity. The answer is that Persians were just a pain in the ass with their religion being tied to the state and a rule against overthrowing a bad king. They would invade neighboring countries who had a legitimate reason to depose their own bad king. "No! your bad king must destroy your country and your people get invaded! No! we will invade you now!" Everywhere else west of Persia was too slow to adapt a mature spirituality with a good set of moral codes. Christianity kind of became an amalgamation of that. But it is very sematic at its core.