If they truly loved their child more than they loved themselves, they would agree to the blood transfusion, even if they themselves completely believed in the JW demands. That way, their child would live, and would NOT be held responsible, while the parent would accept all responsibility. Even if the parent were disfellowshipped, wouldn't it be worth it? Creepier still, even if the parent thought that they themselves might not be resurrected... they would know that their child would be guilt-free.
Baba, This is not how I felt as a JW. IF my child were to die for want of a transfusion, I would know that he/she would have a free ticket into the new system. If he/she lived, there was always the chance that they would leave da troof and have no hope at all.
The most loving, selfless thing I could do would be to let my child die, and I am deeply ashamed to say i would have.