Not sure I agree that 'evil' comes from being abused as a child. I know plenty people who were abused as children, certainly doesn't make them evil.

I had a discussion with a psychologist about people who are 'evil' and he said they were people with no soul. I think that sums it up. To do 'evil' deeds is a choice made by someone with no morals or values or simply to gratify there own ego.

I have read media reports of someone saying that XXX was evil because they were psychotic which isn't right because when someone is psychotic they are not aware of what they are doing.

Hitler on the other hand knew exactly what he was doing and took pleasure in torturing people, power was what he thrived on. He had no soul.