Sorry Pete, I just don't understand people like this, it just doesn't compute.
When JW's behave this way to their family members it reminds me of the time Jesus Apostles, full of their own importance, were heavily condemning the prostitute . They were willing to condemn her to the fullest while Jesus himself, the Son of God, was kind and forgiving to her.
It's a case of "The Butler(s) being more grand than the King himself".
It's sometimes the same way in an office. The head manager might be casual and have an open door management style but to speak to him one must first get past the $10.00 and hour clerk who is being far more officious than she needs to be by creating unnecessary road blocks because she's on some kind of personal power trip.
Shunning people is the only power the the GB allows the lowly individual JW to have. When shunning, most of them aren't primarily concerned with "sticking up for Jehovah". Their main motivation is the extra sense of virtuousness they get to experience by doing so. They get to play the role of the martyr (look what your actions done to me). Then also enjoy how noble it makes them appear to the group. This is referred to as "Virtue Signaling".