A messianic insurgent executed by Rome. The only Jews who would have been on-board with executing him would have been the Sadducee elites who collaborated with the Romans.
It’s a whole lot like during the GWOT with Americans occupying ME shitholes and having a puppet Muslim government who works with them to eliminate fellow Muslim extremists and insurgents.
Christianity grew anti-Jewish as time went on, because of Roman anti-Jewish attitudes as a result of the wars and revolts, so claiming the Jews as Jesus’ enemy was useful, even necessary, for it to be salable and to spread among Romans.