We all watch television and see that humans in general are a pretty violent species. Not a day goes by without a report of violence. We are afraid of lions and tigers, but they only kill or maim when hungry. Not so our species. General studies show a rather faint correlation between violence and mental illness.
If a mentally ill person is taking meds and drugs, this can lead to violence. If the same person is not on medication and takes drugs, this too, can lead to violence. If a person taking medication due to a mental illness drinks alcohol, he can become violent, but if a ‘so-called healthy person’ drinks too much, he has been known to become violent and knock his wife and family around.
Actually, most people with mental illnesses are more likely to hurt themselves or become the victims of violence. They are more likely to be attacked, raped or mugged than the rest of us
Movies and the media spread stories about crazed people. Remember the movie about Hannibal Lechter, the serial killer? Remember other movies that indicate that we should keep away from them all; that they are all dangerous, that they should all be locked up.