Pharisees and Sadducees are, in very broad terms, like Democrats and Republicans today. Sadducees tended to be wealthy and conservative, while the Pharisees were more about the common folk. At least on paper. In practice, maybe not so much. Like the way a lot of modern leftists hate the Democratic party, historical Jesus could very easily have hated the Pharisees while aligning somewhat with their stated positions. That certainly comes through in the literary version of Jesus.