Jesus in the Talmud
In the first few centuries CE, there were many sects of Judaism (such as Pharisees, Essenes, and Sadducees) each claiming to be the correct faith. Some scholars treat Christianity, during that era, referred to as Early Christianity, as simply one of many sects of Judaism. Some sects wrote polemics advocating their position, and occasionally disparaging rival sects. Some scholars view the depictions of Jesus in the Talmud as a manifestation of those inter-sect rivalries – thus the depictions can be read as polemics by the rabbinic authors of the Talmud which indirectly criticized the rival sect (Christianity), which was growing and becoming more dominant.
Hasidic Judaism
The Bobover dynasty, founded 1881 in Bobowa, West Galicia, constitutes some 4,500 households in total and has undergone a bitter succession strife since 2005, eventually forming the "Bobov" (3,000 households) and "Bobov-45" (1,500 households) sects. Sanz-Klausenburg, divided into a New York and Israeli branches, presides over 3,800 households. The Skver sect, established in 1848 in Skvyra near Kiev, constitutes 3,300. The Shomer Emunim dynasties, originating in Jerusalem during the 1920s and known for their unique style of dressing imitating that of the Old Yishuv, have over 3,000 families, almost all in the larger "courts" of Toldos Aharon and Toldos Avraham Yitzchak. Karlin Stolin, which rose already in the 1760s in a quarter of Pinsk, encompasses 2,200 families.