Questions about Mitt and the Mormons

Image from the Book of Mormon: Swords: Many critics of the Book of Mormon state that it is common knowledge that swords such as those described in Alma 24:12-15 did not exist in meso-america prior to the arrival of the Spanish Conquistadors, despite what the Book of Mormon says.

Read more here: 

http://the-book-of-mormon.com/photo-proofs.html

Several Native adoptees who are new friends were adopted by Mormons. And there are more than a few Native Americans and Alaska Natives who follow Joseph Smith and the Mormon religion.
I remember living in Wyoming back in the 1980s and heard what a serious religion it is - no soda/pop, no dancing, no drinking, etc.  The joke in Jackson Hole was "Mormons act like God can't see over the Tetons." Mormons apparently broke many of their rules visiting Wyoming saloons - out of Utah and out of sight, I guess.
(By the way, I heard the fabulous Mormon Tabernacle Choir in concert in Wyoming.)
Friends tell me if you are Mormon, you had to give them a copy of your income tax paperwork because you are required to tithe 10% of your income each year - no exceptions!
I am not bashing anyone's religion here but I do question why so many Native American children were adopted by the Mormons and converted to this religion. There was an official Mormon Indian Adoption Program where they took thousands of tribal children per year, many from the southwest. Some adoptive families had 10+ children in each family.
My friend Joan had a son who married a Mormon girl in Salt Lake City but Joan wasn't allowed in the Mormon church to watch the wedding (later they did a vow repeat for the non-Mormons at a restaurant reception.) Why can't a mother watch her son marry a Mormon since she will be the girl's mother-in-law? What is about Mormon's documenting all their genealogy - it seems every ancestry site is now owned by the Mormon Church?
With the Mormon "Mitt" trying for the White House, I have many questions and not enough answers about this religion.
I do hope someone adopted by a Mormon family will offer to write a guest blog (please) and help me and others understand...What exactly is the Mormon religion? Or is there a rule you can't speak about it?