Well, the New Testament (what Christians care about) is entirely set in the historical first century Roman Empire [0], all places are accurate and known to exist.
The Book of Mormon postulates some fantasy world perhaps not unlike Middle Earth? And also weird theological stuff from 19th century science-fiction? Sorry, that is a different religion.
[0] expect for the last book of revelations of the future.
Why do you feel that most christian sects cannot decide they are heretics? We're not talking about some Lutheran Synod politics BS, they have this whole fantasy/scifi book and theology.
Obviously it's a free country, so they can say whatever they want.
