I think we can all agree that nobody who murders and tortures someone is mentally normal.But that doesn’t equal them being mentally ill or deserving of sympathy
Can't you see the contradiction in this statement?
If 'nobody who murders and tortures someone is mentally normal', then what else are they but 'abnormal'???
It needs to be driven home that 'mental illness' and personality disorder are not one and the same thing. We're talking about abnormal, atypical, damaged, an aberrant personalities here, not just people who have a mental illness.
I think it’s a grey area between mental health and someone just being pure evil
It really is not, because there is absolutely no such thing as 'evil'.
Actions and behaviours can reasonably be described as 'evil', and everyone will understand what is meant by that statement, but 'evil' is not some sort of entity that compels people to do things or can act of it's own accord.
Psychopaths are certainly capable of actions that could rightfully be described as 'evil', but these people are not what they are because of evil. That's the same sort of nonsense as claiming something is down to witchcraft, fairies, or magic. It's risible.