For some people, dispensationalism is simply "true" because they have heard it from their parents, from every Christian teacher they have learned to respect, or both. I was thinking of people like a professor, a PHD, whom I heard tell a story about an American Indian leader who was responsible for the death of a person who was a witch by the definitions of Indian culture. The victim died because the Old Testament commands that witches be put to death. The professor said that the murder happened because of improper (non-dispensationalist) biblical interpretation.