The word "evil" can mean different things to different people. What one would see as "evil" another might see differently. I wanted to comment on Hitler for a moment. I understand that he was abused as a child, to what extent I dont know, but that can really twists ones mind.

Does it excuse the behavior? no, but who knows who or what he had in his life to help him cope. I also know at the height of his reign he was addicted to methamphetamines. This alone would cause psychotic behavior. I believe for one to be "evil" you would have to be aware of your thoughts (understand the difference between right and wrong), know and understand the pain it would cause, and put those thoughts into action.

I cant for the life of me wrap my mind around serial killers. Why do they get pleasure off of torturing their victims and then killing them? I know its a power and control thing but I cant see someone who is sane, making this conscious choice to inflict this type of brutality on another human being.