If this man is indeed a paranoid schizophrenic (im not a doctor and im in no way qualified to know if he is or isnt) then i feel pitty for his victiums and pitty for him. That he wishes to believe in paradise is, i would suspect , a coping mechanism.
That he was ultimatly drawn into the cult is irrelevant to his murders prior to his being medicated and ultimatly indoctrinated in the cult.