What happened when Emperor Constantine embraced Christianity around 300-315 A.D.?
When Emperor Constantine embraced Christianity around 300–315 A.D., the Church exploded in numbers. People came in by droves because Christianity became the thing to do and now had the Emperor's sanction. This growth led Church Fathers to conclude God was finished with Israel and had transferred Israel's promises to the Church.
Les explains that shortly after 300 or 315 A.D., something fantastic took place: Emperor Constantine embraced Christianity. That caused the Church to explode in numbers, and people came in by droves because it was the thing to do and now had the Emperor's sanction. As Christianity spread across the Roman Empire, Church Fathers—beginning with one at a big seminary in Alexandria, Egypt—looked at how the Jewish Temple had been totally destroyed and the Jew had been uprooted and scattered like vagabonds or gypsies throughout the Roman Empire. He concluded God was through with the Jew, that the promises given to Israel and Abraham had been abrogated, and that they were given instead to the Church. Les notes this destroys all end-time prophecy, because all prophecy is directed solely to the Jew.