If I may...having gone through a legal situation years ago that revolved around my religious beliefs(or lack there of) I would caution you and encourage you to be patient and reserve judgement. It's often easy to sit on the outside of a situation in a nice warm house, money, family around you, etc. and evaluate someone else decisions and think they shouldn't have. We all do it. Me included. It's just that after it happened to me I might make judgements in my mind or come to some conclusions after thinking of someone's situations but I keep them to myself and am very slow to divulge them to others.
I did like this line "Don't Hate the Player, Hate the Game, but Play the Game when it's in your Best Interests."
See my situation was much different and most of my religious friends thought I should not engage with the courts and legal system. But I played the game and played it well and yet lost more than I could have imagined. So even to this day they all say amongst themselves "I told you so" in all it's various forms.
So I've seen in my personal situation and later in a few situations of others where in all appearances they were just and right and played the game carefully and shrewdly and had obviously all the facts and proper documentation clearly in there favor and lost anyway. And yet it was easy for those watching from the outside to evaluate it later, like armchair quarterbacking, and see how they screwed themselves. And then sit back and feel good and have fake peace that it would never happen to them because they saw those other peoples errors and they think they are smarter. I would submit that even if the Grenon's had played their cards differently they would have lost anyway. The system was out to get them and make an example of them.