jehovaxx: Surely this is true of any feeling of brotherhood?
No. Even without context, we can understand how some bonds are much stronger than others.
But in context, we also understand that the conditions for brotherhood as a JW are not healthy. The requirement to treat someone as a pariah at the drop of a hat, only to reverse course just as suddenly, is emotionally jarring. Especially when the action is not due to something between you and that person, but a decision handed down without explanation or detail, and enforced with the threat of your own disfellowshipping. And, if that person is readmitted to the group, you must welcome them back and pretend that everything is as it was before. It's not.
Add the family dynamic to this, and the consequences are that much more painful. Moral relativism is not going to ease that suffering.