Even if people do wrong we're social animals so what can we do about stopping them doing the same things in future? Saying people are 'bad' or 'evil' is just an unwillingness to engage an unwillingness to try to empathise. That sanctimonious attitude doesn't help anyone.
Then I heard this genius teacher Stella Adler - I recommend you read anything you might find about her and if you have anyone interested in theatre you get them one of her books.