I would have written more in-depth about the origin of the Friday The 13.th mythology in our culture and it's meaning as a day of Evil and disaster. But I have been met with some rather serious issues in my private life - "stuff" I had to attend to and couldn't put off till later - so I'm giving you a little personal statement instead...
True Evil from a Psychopath's Perspective.
Do you know, when someone is being executed, they have ten men doing the killing. But only one of them actually DOES kill the target, and everybody knows this.
All ten men will perform the killing act, but positioned so that they can't see the target, they can't see him die, and they can't see who among them kills him.
How is that a good idea?
If you don't like the thought of killing someone, you will be haunted for the rest of your life by the thought that you may have done the killing.
If you do like the idea and would like to kill someone, you will forever be nagged by the annoying awareness that maybe you got to do it but not really experience it, nor will you ever know about it. You may have gotten to do something you wanted, and yet never having done it.
All you get in any case - if you're a neurotypical person or at least someone who has a personal relationship with morals and knows the feelings Guilt and Empathy - is the guilt ridden consciousness about maybe having taken someone's life, which is wrong per definition according to the Christian dogma.
At the same time we have the victims with their need for revenge - though they may not be consciously acknowledging this - sitting at home, never getting to get revenge, while a faceless, soulless state does it for them, so they have to be grateful to the state because it saved them and revenged them too. They remain the victims, and they know they still can't defend themselves, they'll be just as helpless should they be targeted again!
The target too gets no opportunity to ease or apologize, or otherwise "give back" what he took. Because he cannot give it to someone that he never wronged or took from, much less since it's an entity that has no personal existence but is faceless, unmovable, untouchable, invisible, truly soulless, relentless, remorseless and apathetic to abuser and victim alike.
So he becomes a victim too, but can't even know his abuser, nor address him.
Everybody loses, except an impersonal state who makes victims of us all and forces even the neurotypical, empathic and normal citizen to become less and less human, and more and more vulnerable, more and more dependent upon life not happening, because they have no way of dealing with it. And impersonal state who has no need for revenge, because it has no feelings and basically doesn't really exist. All it can do is devour the souls of it's subjects, and it does this far more effectively than any psychopath ever could.
In such a world everybody may be equal, but nobody is a winner.
Indeed, everybody loses!...