What is the point of a bible story? To put a spin on ancient history so that people can understand it. Cain and abel is a metaphor for Agriculturalists (Cain) and Herders (Abel). You're assuming it's about faith and religion, and that is evident by lack of familiarity of the subject.
EASY MODE: Pilgrims vs. Indians, but in ancient times. Do you get the drift? Mankind got to where we are today because the Agriculturalists, and that's why the world is overpopulated and Indians are almost extinct, we killed them because they had a different way of life. That's what the Anti-Spirals do to Spirals.