Plotinus, I disagree. I believe if there is a actual reason behind what they do it isn't inherently evil. In some ways it is more despicable, but not more evil. If you truly believe that your killing of all the Jews will benefit the world, I would not call you evil. Stupid, despicable, vile, inhuman, vicious, horrible, and many other terms would be out there, but not evil.
In my view, with the truly evil, they are thinking rationally, they know what they are doing wrong, but believe they have some right to do it anyways and yet still performing the evil deeds, so that you can't make them change their ways.
In my view, with the truly evil, they are thinking rationally, they know what they are doing wrong, but believe they have some right to do it anyways and yet still performing the evil deeds, so that you can't make them change their ways.