Often in the Gospels, we hear of Jesus clashing with religious leaders in the Jewish Community. One of these groups is the Pharisees.
The Pharisees were a sect in Judaism during the Roman Empire. We might compare this to a denomination in the modern church. They were primarily about following the Law (Torah).
A lot of anti-semitism has come from lumping all Jews, and sometimes all Pharisees, together. It's helpful for us to remember that not all Pharisees were bad. Jesus Himself taught that He had come to fulfill the Law. Also, one of the main leaders of the early church was Paul, a self declared Pharisee. We certainly should remember that Jesus and His disciples were themselves Jews.
We as Christians are connected to the tradition of the Pharisees, particularly through Paul. One could even say we come from that tradition. Modern post-Temple Judaism also comes from the tradition of the Pharisees, so we have much more in common than we might think.
We should not forget that during the Passion reading on Palm Sunday, the Congregation takes on the role of the audience saying "Crucify him! Crucify him!" There are many good things about the Pharisees as well as many bad. No matter what we think of the leaders of the Pharisees in Jesus' time, or the other religious leaders as well, we too are not without guilt. We can always use some humility in our lives, especially when it comes to pointing fingers.