The title of this thread is good: how a cult can evolve. There are always many factors involved. This video reminds me of a story someone once told me. There was a teacher who had a dog, and this teacher would give a lecture in the village every Thursday. During the lecture he would tie the dog to a certain tree near the lecture area. People heard his lectures for many years, until the man one day died, and another learned person was selected to continue giving a weekly lecture. Every Thursday the people would come to the lecture area, tie a dog to the tree, and then hear the new lecturer speak. Why tie a dog to the tree? Well, because that was the example set by the original teacher. A silly example perhaps, but this is (in part) how many customs and traditions are created.