In some earlier reports I read, son B was whining to dad B about this and that: how unfair the US is to the poor, how the Taliban is just defending themselves against the Imperialists, how he wants to do something to help them. Dad B is reported to have told son B to “just follow your conscience”, no admonition to live up to his obligations and commitments, just “go where your heart takes you” pap. I think, with no proof as to whether I am right or wrong, that dad B is another west coast liberal airhead who failed to raise his son with any sense of values or self discipline. Because he was, more or less, encouraged by his father, son B might now be angry with him, blaming dad for not helping him come to a better decision.
I wish them both well in the next life, but I think they have pretty well screwed this one up.
Jane Fonda was always annoyed that decent Americans continued to hold her treason against her, even weeks after she came back from her beach vacation with her communist friends, not to mention continuing to mentioning it years and even decades later. When your treason is national news (and thanks to Obama taking a victory lap around the Rose Garden celebrating his brilliant trade of one junior deserter for five senior terrorists, Bergdahl's case is as noticeable as Hanoi Jane's), it's hard to live that down.