I had the same thought initially, but then I thought about it. I don’t know this family, but from what it sounds like he is literally watching helplessly as his brother slowly kills himself. At this point he probably just feels so helpless that he is grasping at straws and hoping a facebook post will get enough friends and family involved that an intervention may work. If I were him, I would rather my brother hate me for his entire long life than love me for his short life.