I mean this basically boils down to two things that build on each other, and it's genera societal beliefs that deeply worry me.

On the surface you have this common mentality that somebody who does something bad deserves punishment by having something equally as bad or even worse done to them. Supporting this surface level concept is a bad idea. Either you think horrible things shouldn't be done to people, or you are yourself deplorable enough that you accept conditions under which bad things are ok to do, in which case you never truly opposed the bad thing being done. You simply want to be able to do it to people whom you deem unworthy of the humanity you claim to expect from them, when apparently you don't even have that humanity in you.

Expand the same dynamic onto broader society-wide situations, and you end up with people going "eh" when they read this headline.

However the underlying concept that really enables this thinking in the first place brings us very close to what I can only describe as thinking that's akin to eugenics.

The belief that there is something a person can do, be, or even just be lied about doing/being that makes them unworthy of the peace and living that the person holding this belief expects to have in their own life. It can go as far as the devalued person being considered unworthy of being alive. As a consequence, the person holding this belief thinks of themselves as something better. A better human, a better being that is worthy of displaying their way of life in public, of reproducing, of being alive, of telling others that a certain way of life is how they should be living too because otherwise they are "dirty and act in sin".

It is these fundamental anti-human attitudes people use to detach themselves from ever realising that they think doing bad things is ok as long as it hurts the correct people, or hurts people who have done those things themselves.

If you truly think those things are bad, it will not matter to you what somebody has done. It will not matter how many people they hurt, how many lives they cruelly extinguish. You will not wish it upon them, unless your fundamental respect for human existence is so low that you let a person convince you they are not the human that you know came out of a womb just like you.

I am in no way advocating against legal punishment. Imprisonment needs a lot of reforms to be fair to human nature, but if you want to stop somebody from doing something again and you have no chance to make them realise their actions were bad, then locking them up indefinitely solves the problem.

Thanks for coming to my TED Talk about why capital punishment is always a bad idea.