Just that all parties involved were members. I'm not sure how deep it goes, but I think a few things are apparent. That B was a member made Jan's family more willing to trust him. Also Mormons in general seem to have a propensity for naiveté and being overly trusting. I think we see this when they say they didn't even know what a child molester was, and their general inability to recognize / conceive of the threat. It's not just that it was a different time, it was a community that never discussed these things openly.
It does seem that the leaders of the church knew that B had been trying to infiltrate various families in an effort to get close to their children. It said in the documentary or somewhere else that he had been "disciplined" by them. Not sure what this means, but doesn't seem to have been that serious of punishment since he wasn't removed from the church or reported to the police. Kind of seems like the possibility of cover-ups in the interest of protecting the image of the church, not unlike the Catholics.
The really shady thing about is that I firmly believe that the church's anti-adultery, anti-homosexual rhetoric was so ingrained into these people that they singed that statement trying to get B off the hook for the first kidnapping just because B's wife threatened to reveal that B and Jan's father had a sexual encounter. This was before B and the mother had even began their affair.
I think this explains to a large degree why the father was such a useless fuck. Guy probably had serious mental and emotional problems from repressing his sexuality his entire life, thinking his attraction to men were deviant, sinful thoughts. The one time he stopped repressing his natural sexual inclination was when he jerked off the guy he later found out was his daughter's molester. Not that I feel bad for the guy, he lost sympathy due to his utter failure to project his family.
