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.
Sectarian discrimination
Sectarianism also exists between Orthodox and Reform Jews, with orthodox Jews often characterizing reform Jews as being non-religious, disobeying the Torah, rarely attending shul and adopting semi-Christian styles of worship. Reform Jews, on the other hand, often view the orthodox as being intolerant of them and of other religions, placing legalistic rules such as the observance of the Sabbath above ethical obligations, being cult-like and hostile to change.