Why did Christanity develop their own religion?

Christianity introduced in the 1st century AD as a Jewish denomination but instantly expanded during the Greco-Roman realm. Notwithstanding fresh oppression of Christians beneath the Roman Empire, it converted the land faith in the end.

Explanation:

Christianity started as a Second Temple Judaic faction, in the 1st century, in the Roman territory of Judea. Jesus' followers and their heirs the Apostolic Fathers expanded it throughout Syria, Europe, Anatolia, Egypt, Transcaucasia, Ethiopia, Mesopotamia, and Asia, notwithstanding fundamental oppression. Emperor Constantine the Great transformed to Christianity and decriminalized it in the Edict of Milan, later meeting the First Council of Nicaea where Ancient Christianity was combined into what would mature the state faith of the Roman Empire. The council formed the Nicene Creed, and the Church Fathers conducted the gathering of the Christian Bible (5th hundred).