Jewish is not a religion because some Jews have realized that Elohim (His first self-identification in the Bible) is a plural word, used by Him in the Word until the time of Moses when He began to identify himself as Yahweh too, so Jews who have accepted Jesus Christ as the Messiah understand and have embraced that Elohim includes Father, Son, and Spirit, while Jews who call themselves Judaists have their heads in the proverbial sand.