I would ask you my friend to please research a bit about the church's history by other sources then the church itself. That is not something extravagant at all to ask, for a simple job interview for example they require different sources of people who might know important facts about you, they won't only listen to family members for example.
Please use the many different tools we now have, the internet, libraries, read and ask the uncomfortable questions to the missionaries. It's not real investigation if all you are listening to is one side.
