Several passages in the Fourth Gospel indicate that a massive upheaval occurred. This disruption resulted in Jews who believed in Jesus being prevented from entering the synagogue. There is no proof of what caused this exclusion. I investigated The Religion and Worship of the Synagogue: An Introduction to the Study of Judaism from the New Testament Period and J. Louis Martyn's History and Theology in the Fourth Gospel, but I wanted to understand the range of viewpoints on the subject. Any advice on how to do so is appreciated.