Is there a major difference between having something seriously wrong with you (mentally or behaviorally) and being insane?
Yes, they are two separate classifications. You can be a bad person without any mental illness. It is more common to be a bad person and same then a bad person with a mental illness.
So evil vs insane? How do you tell the difference between a person doing evil deeds because he is evil and a person doing evil deeds because he is insane?
The presence of a mental illness is what differentiates between those.
You're just repeating the classification. I'm asking how do you tell the difference? People don't have labels on them displaying their mental classification.
A doctor usually. Symptoms let you know. Violent crime isn't a symptom.
Obviously a doctor is the person doing the evaluation. Obviously they use "symptoms". I bet violent crime can be seen as a symptom.
