‘Warrior Spirit’: This initially straightforward doc turns into an ominous, cautionary tale

“Warrior Spirit” – Nicco Montano is a woman of firsts.  At 28 years young, on Dec. 1, 2017, she won the UFC Women’s Flyweight Championship.  On that day, she became that division’s premiere female UFC champion and the organization’s first Native titleholder. Wow. In the documentary “Warrior Spirit”, Nicco – an admirable, inspirational role model with Navajo roots – arrives at her alma mater, Chinle High School in Chinle, Ariz., and speaks at the 2018 graduation ceremony.  Students, parents, and teachers give her a rock-star welcome, and she reciprocates. “Thank…