With all these mind games being played, I feel a psychiatrist is more likely the person behind Red John. Dr. Linus Wagner could be experimenting with people. He is like those sophisticated people who feel better than poor people. Nietzsche once wrote that psychiatrists separate themselves from the human race. His last name could be paying homage to Nietzsche contra Wagner.  Dr. Wagner wants to see Jane do something unpredictable, so he sends McAllister after his wife & daughter.  Jane reacts exactly as the Doctor expected.  He finds William Blake to be sophisticated.  Despite the good intentions of the doctor, he feels the need to socialize - to make him feel good.  He finds his self (inner character) to have human desire, although he differentiates himself from regular humans.  He makes the Blake Association, because he wants to delve into this relationship that he has found between himself and ordinary humans.  He found Blake and Nietzsche were communicating sophistry, in writings.  Red John was supposedly a sadist.  Perhaps the doctor was studying libidos.  He wants to be caged, so he can see what being domesticated feels like.  Jane is too busy to notice who is behind the Blake Association; Jane just wants to kill Red John.  Dr. Wagner tried to take responsibility for Red John, but Jane knew it was somebody else.  Jane doesn't care about why Red John killed his family.  Dr. Wagner wants to see Jane be domesticated, but Jane is resisting.  He doesn't shave. he wear wrinkled shirts.  Wagner just hopes that he is able to be objective, because he believes that is what Nietzsche wrote is the way of psychiatrists.  Wagner has been studying humans this entire time. He intends to keep on studying his primal urges, while he is in prison.  He wants to feel more human.  He wants to experience a human all too human feeling - which he ascribes to greed or selfishness (subjectivity).  Hence, he call himself Wagner - inspired by Nietzsche who wrote "Nietzsche contra Wagner" & Dr. Wagner is a psychiatrist who wants to be subjective - rather than Nietzsche's preferred objectivity.