Judaism
Christianity was originally a sect of Second Temple Judaism, but the two religions diverged in the first century. The differences between Christianity and Judaism originally centered on whether Jesus was the Jewish Messiah but eventually became irreconcilable. Major differences between the two faiths include the nature of the Messiah, of atonement and sin, the status of God's commandments to Israel, and perhaps most significantly of the nature of God himself. Due to these differences, Judaism traditionally regards Christianity as Shituf or worship of the God of Israel which is not monotheistic. Christianity has traditionally regarded Judaism as obsolete with the invention of Christianity and Jews as a people replaced by the Church, though a Christian belief in dual-covenant theology emerged as a phenomenon following Christian reflection on how their theology influenced the Nazi Holocaust.
Religion in Israel
Israel does not have a constitution. While the Basic Laws of Israel that serve in place of a constitution define the country as a "Jewish state", these Basic Laws, coupled with Knesset statutes, decisions of the Supreme Court of Israel, and various elements of the common law current in Israel, offer some protection for free practice of religion in the country. Pew Research Center has identified Israel as one of the countries that places "high" restrictions on religion, and there have been limits placed on non-Orthodox streams of Judaism. Legal accommodation of the non-Jewish communities follows the pattern and practice of the Ottoman and British administrations, with some important modifications. Israeli law officially recognizes five religions, all belonging to the Abrahamic family of religions: Judaism, Christianity, Islam, Druzeism, and the Bahá'í Faith. Furthermore, the law formally recognizes ten separate sects of Christianity: the Roman, Armenian, Maronite, Greek, Syriac, and Chaldean Catholic Churches; the Eastern Orthodox Greek Orthodox Church; the Oriental Orthodox Syriac Orthodox Church; the Armenian Apostolic Church; and Anglicanism.
Relations among religious groups—between Jews and non-Jews, between Muslims and Christians, and among the different streams of Judaism, such as Orthodox, Reform and Conservative—are often strained.