One of the things that I learned in reading “The Conquest of Mexico” is that forced conversions to Christianity were forbidden.
Lew Wallace, who wrote BEN HUR, also wrote THE FAIR GOD, a novel about the conquest of Mexico.
In it, a soldier stumbles upon the fabled underground city and converses with an Indian Priestess. As they make their way toward the exit, he tells her of the Catholic Christian religion, and by the time they find the exit, she has converted.
Unfortunately, upon stepping out into the upper world, right in the middle of a battle, she is hit with a crossbowman’s bolt and killed, a Saint of Christ the author said.