You're an idiot. The LDS religion has never condoned rape and kidnapping. Regardless of historic doctrines concerning polygamy, none of the LDS leaders could or would consider anything that Mitchell did as being "doctrinal", more like "abominable". Furthermore, the whole premise of continuing revelation through latter-day prophets facilitates the evolution of doctrine as times change. Therefore you can't be a true fundamentalist in such a system because that would mean rejecting the counsel of a current prophet's guidance in favor of a past prophet whose counsel may no longer apply. As an outsider you may not subscribe to it, but technically speaking this makes for the argument that there's no such thing as a "Mormon Fundamentalist". People labelled as such are rather those who have lost their faith in latter-day prophecy in favor of their own vain beliefs.