i dont think he was a dick at all really, he was right, both for the other spouses and her that group would not be a safe space with debbie present, debbie would be constantly reminded of her husbands actions and how she failed to prevent them and the other spouses may be distressed or aggressive to her because of it, green ghosts husband handled the situation responsibly and while clearly angry refused to let his anger get the better of the situation, yes he blames debbie for not knowing nolan was lying but he doesnt blame debbie for green ghosts death