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.
Hashkafa
With the rise of Jewish philosophy and great Jewish thinkers, various sects of Orthodox Judaism have developed throughout history, each with their distinct hashkafa. While certain meta-principles are present in all sects—primarily the ones precisely demarcated in the Torah and Talmud, others have been the subject of much disagreement, especially those that deal with pertinent and pressing issues. Despite the vast differences between Hasidism and Modern Orthodoxy, both are still considered legitimate. The idea that there can be more than one correct understanding is deeply rooted in Jewish texts. The most well known of such statements is from the Midrash—the collection of exegesis of Torah taught by Rabbinical Sages of the post-temple era—in Bamidbar Rabbah 13:15, which explains that there are "seventy faces to Torah". This perplexing statement is generally understood to mean that the nature of the Torah's truth is multifaceted. Similarly, the Babylonian Talmud states regarding a legal debate that "these and these are the words of the living Lord"; in other words, both opinions are valid. Because no single hashkafa is believed to have a monopoly on the truth, great amount of philosophical flexibility is provided to Jewish thinkers, which results in different—sometimes even contradictory—hashkafas.