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.
Hasidic Judaism
In 2016, a study conducted by Prof. Marcin Wodziński, drawing from the courts' own internal phone-books and other resources, located 129,213 Hasidic households worldwide, about 5% of the estimated total Jewish population. Of those, 62,000 resided in Israel and 53,500 in the United States, 5,500 in Britain and 3,400 in Canada. In Israel, the largest Hasidic concentrations are in the Ultra-Orthodox neighbourhoods of Jerusalem – including Ramot Alon, Batei Ungarin et cetera – in the cities of Bnei Brak and El'ad, and in the West Bank settlements of Modi'in Illit and Beitar Illit. There is considerable presence in other specifically Orthodox municipalities or enclaves, like Kiryat Sanz, Netanya. In the United States, most Hasidim reside in New York, though there are small communities across the entire country. In Brooklyn, Borough Park, Williamsburg, and Crown Heights all house a particularly large population. So does the hamlet of Monsey in upstate New York. In the same region, New Square and Kiryas Joel are rapidly growing all-Hasidic enclaves, one founded by the Skver dynasty and the other by Satmar. In Britain, Stamford Hill is home to the largest Hasidic community in the country, and there are others in London and Prestwich in Manchester. In Canada, Kiryas Tosh is a settlement populated entirely by Tosh Hasidim, and there are more adherents of other sects in and around Montreal.