From what I've collected over the years, Glass' personal life has a lot of stress and disappointment. Not saying it's an excuse, but I can see where a lot of his anger and hate comes from.
Maybe to a point, the forums is a place for him to vent his pent up anger and frustration. I understand because at that age, I was a quiet guy in person, but I had my own ways of dealing with the stuff life throws at all of us.
I think the best thing would be for him to realize that there's nothing that he'll get from this community beyond hate and retaliation, and move on for good.