I tell you what. I GIVE UP! You want to say that you were not an a-hole. You want to say there's nothing you can do. He's not your son, he's your step-son. You want that to make a difference. You don't want to confront the elders or this individual. You just want to be nice and you are venting your frustration here.
If your step-son goes to college, he probably will wake up to the reality of Jehovah's Witnesses. I hope the best for him.