Judaism
There are some movements that combine elements of Judaism with those of other religions. The most well-known of these is Messianic Judaism, a religious movement, which arose in the 1960s, that incorporates elements of Judaism with the tenets of Christianity. The movement generally states that Jesus is the Jewish Messiah, that he is one of the Three Divine Persons, and that salvation is only achieved through acceptance of Jesus as one's savior. Some members of the movement argue that Messianic Judaism is a sect of Judaism. Jewish organizations of every denomination reject this, stating that Messianic Judaism is a Christian sect, because it teaches creeds which are identical to those of Pauline Christianity.
Hasideans
Scholars have until recently started with the assumption that Hellenism "took root only in the upper classes of society, the main body of the [Jewish] nation being wholly untouched by it" and distinguished between the pious, law-abiding majority of the people and the Hasideans as a society of "extra-pious" Jews. However, the sources mentioned do not justify such a view. The συναγωγ σιδαίων of the books of the Maccabees, upon which so much emphasis is laid, corresponds, as has already long been known, to the קהל חסידים of the Psalms, which means neither "sect" nor "society", but only "congregation", with no idea of party. The piety attributed to Ḥasidim in the Talmudic sources is not in any way suggestive of a sect (Lehmann, in "R. E. J." xxx. 182 et seq.). The supposition that they were a sect closely associated with the scribes, and related to them, rests only on the fact that the two classes are mentioned together in I Macc. vii. 12, 13; the genuineness of verse 13, however, has been questioned by Hitzig ("Gesch. des Volkes Israel," p. 417).