According to the Bible, the only two organizations used by God are the Jewish [started by Abraham] and the Christian groups [the latter started by Jesus, of course]. If you belong to a group that calls themselves anything besides or beyond Christian or Jewish, you are in trouble. Jews, along with everyone else alive, should all follow Jesus's instructions to convert to Christianity. And, both those groups can really be thought of as one, since Christianity grew out of and completed, or replaced, Judaism... (Gal 3:26-29; Col 3:5-11)