Agree with AnyFuckerforaMincePie
And to add a different perspective:
I have a close family friend who is a policeman who also happens (as I can personally testify) to be a really decent human being, devoted family man, fairly liberal politically-speaking, opposed to the the death penalty, has managed to keep his humanity despite working in the vice squad (among other areas) and encountering some pretty horrific situatiosn.
He says that when you have worked as long as he has in this sort of field, you develop a strong instinct about people and their motivations and that in 20 years of policing he has only come across 2 men he would describe as "pure evil". I was surprised to hear him say this as he doesn't use language flamboyantly. He says when it occurs it transcends class, education, levels of intelligence but that he does personally think "it" (whatever "it" is) exists.
I've also heard three criminal barristers, two lawyers and one director of a homeless shelter say the same thing. All of them are highly educated and none would qualify as a "Daily Mail" reader.
Don't agree or disagree - just found it interesting that they (with their work background and experience) should say that.
Don't think the words "pure evil" are appropriate in this case however. Cruel, heartless, woefully stupid and misguided more apposite adjectives imo.