That doesn't seem reasonable to me.
Hmmm... they claim that they are the one and only truth, that those GB people are appointed directly by their "Jehovah", that people are going to live 1,000 years, that 144,000 idiots are going to heaven, that you are better death than living after getting a blood transfusion, that you don't need education other than the one they claim they provide, and they demand you to shun your own family members who don't believe their nonsense. Clapping for a person who for some bizarre reason decides to return to that crap doesn't seem like the biggest deal breaker to me.
Call me crazy, but to me there are quite a few unreasonable things in that cult.