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.
Split of Christianity and Judaism
Most of Jesus's teachings were intelligible and acceptable in terms of Second Temple Judaism; what set Christians apart from Jews was their faith in Christ as the resurrected messiah. While Christianity acknowledges only one ultimate Messiah, Judaism can be said to hold to a concept of multiple messiahs. The two most relevant are the Messiah ben Joseph and the traditional Messiah ben David. Some scholars have argued that the idea of two messiahs, one suffering and the second fulfilling the traditional messianic role, was normative to ancient Judaism, predating Jesus. Jesus would have been viewed by many as one or both.