The Gospel of John and the Jewish Leaders

The Gospel of John is one of the most puzzling books of the New Testament, especially when it comes to understanding its view of Jews and Judaism. On one hand, Jesus is clearly described as a Jew who understands and teaches the law of Moses and who keeps Jewish customs and festivals. On the other hand, the Gospel condemns Jews, makes them guilty for the execution of Jesus, and even declares that their "father" is not Abraham, let alone God, but the Devil. How can one book so fully embrace Judaism and yet condemn it. And importantly, is this kind of vitriolic opposition to Jews and Judaism appropriately called "anti-semitism"? The answer will surprise many listeners.