jgnat said-
But when it is in reverse, parent to child, there are forces you can only guess at knowing. The parent has invested. The child and grandchildren represents a future the parent will never see. To enjoy those fruits, to watch them mature and grow, is the greatest blessing a parent can know. It pays to fight for it.
Unfortunately as Backseat Devil explained, JWs are completely scripturally-based on interpreting the quite-consistent message found in the OT AND NT that God is at the top of the totem pole, and your family members and fruits of one's loins are disposable. It starts with Adam and Eve pointing the finger at others, reinforced by Abraham's willingness to offer his son Isaac as a sacrifice to God, the 10 commandments (rule #1 Love God above all else), the story of Job (lost his children, but was blessed with twice as many more), Jesus family values, etc, etc.
Joining the JWs is going to be seen as an attractive option to those pre-disposed to 'hardening their hearts' to family members (likely due to their own dysfunctional upbringing, which resulted in their attachment disorder), cutting them off in the name of their worship and love for God.
As said, no one who would consider placing God above their own family members would even consider becoming a JW, in the first place, after they learned of the policy (or, they tell themselves it won't happen to them, since narcissistic denial of risks is commonly associated with such personality types, and they tell themselves it'll NEVER happen to THEM!).
JGnat, you said it "pays to fight for it". But HOW, exactly?
What specific steps are you recommending the OP take in order "to fight"? As Bonnie Raitt sings, you cannot force people to do anything their heart don't feel.
As I pointed out, simply crying and pleading with them about how much it hurts to be shunned by them has an inverse effect; to NOT do so doesn't imply denying the pain is felt, but acknowledging that showing it is only encouraging them to inflict MORE pain, in the hopes it's having its desired effect.
Adam