I’m sorry for him, I hope he’ll soon get better. I didn’t have a very happy childhood either, so I think I can understand how he feels about it, but I didn’t know it could develop into schizophrenia.
Bullying and organized harassment has been known to do this.
See: “Psychological Manipulation and Induced Psychological Illness”
http://www.psychologicalharassment.com/psychological-manipulation.htm