Behavior is conditioned. It’s not “Who you are”, no matter how strongly some people have conditioned themselves to accept a particular behavior. Delusions are mental, not physical.
So, schizophrenia, autism, psychosis, dementia are not physical brain malfunctions, but due to external conditions or personal choice? Granted psychology is not an exact science like chemistry, but it's pretty much proven the aforementioned mental problems are due to bad brain wiring - think wrong firing synapses.
That said, I agree that most problems with anti-social types are by choice due to bad external conditions. Or some are just bad seeds from birth. I'm in no way making excuses for them and want them taken out of a peaceful society. I would also include the mellennials due to their brain-washing by agenda-driven teachers. Behavioral "scientists" have long believed that constant indoctrination can re-wire the thought process. The Stockholm Syndrome is the classical example.