Judaism

Judaism was one of the major religions of Earth. It was practised by the Jewish people.

When Christianity came into being the Jewish leaders - in particular the Pharisees - reacted with hostility. They tried to murder Lazarus and any one else they judged to have had contact with Jesus Christ. (PDA: Byzantium!)

"I have no doubt that they, the Jews that is, consider Christianity to be a danger to them."

- First Doctor

Judaism was the precursor to New Judaism. The Tenth Doctor asked the Beast, if he was the Devil of New Judaism, along with that of numerous other religions, to which he responded he was the Devil of all religions. (DW: The Satan Pit)