I kind of suspect a lot of people lie about being religious because it's easier. I did/I still do to my family. There is no way Shari and Chad haven't found the letters yet.
Wait how do we know Kevin was kicked out because porn? Tbh I think this is more "understandable". Though I don't hold the same views.
I can't remember the whole start of that. But it seems the way J got claws into her victims was through shame. I can imagine he was accused of many things over the years. They have 6 kids ... Sex is just obviously easy to tease about.