During Hadrian's time...in 135 AD, the Jewish homeland was nearly completely destroyed, with the resultant end of Israel as a nation. It was at that point that Christianity as we know it truly began to be formulated...culminating with the officialization of the religion in the fourth century by Emperor Constantine.
Friedlander suggests that the pre-Christian Jewish-Gnostic cult of Melchizedek was the starting point for Christian Gnosticism, and he opines that the author of the canonical Epistle to the Hebrews was Alexandrian and involved in Melchizedekianism.
...the "Star in the East" heralded the birth of the Egyptian Messiah thousands of years before the Christian era"
...many ancient gods, kings and heroes were said to have been born under a bright star or some other sort of celestial sign.