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.
Young Judaea
Founded in 1909, Young Judaea is a peer-led youth movement. Its programs include youth clubs, conventions, camps and Israel programs with an emphasis on social action and Jewish identity. Young Judaea has 15 regions in the United States and is affiliated with the Federation of Zionist Youth (United Kingdom) and Tzofim (Israel). The age levels are "Ofarim" (Hebrew for "fawns;" grades 2–5), "Tsofim" ("scouts," grades 6–7), and "Bogrim" ("elders," grades 8–12). Young Judaea's university arm was formerly called HaMagshimim, meaning "the fulfillers"), now college programs focus primarily on volunteering and interning in Israel as well as Birthright trips.