Since the first peoples in Nebraska had been here thousands of years it is very possible that their spirituality was oversimplified by those, especially white folks, who came later. The Winnebago (Ho-Chunk, one of the prominent Native American Nations in Nebraska) beliefs include a concept of a layered universe, multiple souls, reincarnation, a remote creator called Earth Maker, and a host of more approachable supernatural entities representing spiritual expressions of animals, birds, trees, and other natural objects and phenomena.
Europeans in Nebraska brought Christianity, Judaism, and Islam with them. Christianity with all its ramifications was the dominant faith. This oversimplified the picture since peoples from all continents arrived in America and brought their unrecorded spiritual pursuits.