I don't have the answer to the origin of this plague of psychopaths, but the list is now too long to ignore the least common denominator -- that they have either a history of psychological treatment or drug treatment or both -- and then they go on shooting sprees.
This nonsense about "they went off their meds" and "good care givers vs. bad care givers" is just that. Nonsense. It's a rationale to hide ineffectual and/or socially dangerous practices in the name of "treatment." There is not one single psychotropic drug that cures anything. What we are living with is drug-made automatons and sociopaths who are made to pass off as "normal" then allowed to walk free among us.
I would favor a law that eliminates the right of gun ownership to any person who takes psychotropic medications -- you need to be medicated to get through your day? Fine. You can't own a gun. You want drug treatment? Fine. You're on a registry and so is your psychiatrist.
Then watch and see the "mental health" community wail and moan about the violation of their patient's rights while the innocent stand by and get slaughtered. The "care givers" aka drug vendors should be criminally liable for the conduct of their patients.
This carnage has to end.
Have you ever actually worked or been around someone who was schizophrenic? Schizophrenia is an organic brain disorder. The latest technology has been a great asset in understanding what is really going on in the brain during an active psychotic episode.
Whatever. You are entitled to your opinion and I understand that it is based on first hand knowledge of mental illness and medications. Not the Personality Disorders...but true mental illnesses.