messianic jewish movement

Is the Christian movement that goes by the name "Messianic Judaism" a form of Judaism? In essence, so-called "Messianic Jewish" groups claim that they represent a "completed form of Judaism" or "completed form of Jewishness" or "Biblical Judaism." In actuality, self-styled "Messianic Judaism" is a form of Christianity that mimics rabbinic Judaism. The question of whether such groups are Christian cults is a Christian problem. Is it a Messianic Judaism cult? Are Judaism and Christianity the sam