What I see in that string is you insisting that he needs to be "forced" into talking about his problem and all of you need to be involved. This is not the way it is going to go down, no matter how much you would like it to. The enormity of your problem hasn't sunk in yet.
What I see from his parents' text is detachment. Detachment, denial, and the unwillingness to take up this crusade.
Please read around in the Friends & Family sections of this site. You have a very long road ahead.