Somebody who could not feed their children and so ended up stealing food from the local store? Alright, I can see that they might not see any other choice.
Somebody kidnaps and rapes a six year old? Yeah no, they are inhuman and just need to be taken out behind the chemical shed and shot.
There will never be any meaningful criminal reform in the US before the right recognize the existence of the first type of offender and the left the second type.
I recognise that emotional response. I feel a similar way to many with Dark Triad personality traits.
But, making rules for everyone on the basis of the worst of the worst makes things worse for everyone: There are people who know they have a problem, but are too afraid to seek help because they are certain that everyone else will want to kill them if their secret ever comes out. Those people might stay hidden for life, or they might get drunk, do something regrettable, and be so frightened of the consequences that they kill their victim.
Dark Triad types don't think of getting caught, or so I am told. Question is, how many want to do things they recognise as immoral but are afraid to seek help to overcome? How many more seek mental stability by staying in denial, either refusing to recognise they have a problem or by refusing to believe society's condemnation? How many people could be saved by stopping people before they act, by treating humans as deeply flawed and letting the challenge be self improvement rather than simple binary good-or-evil?
I don't claim to know. Could be the hypothetical groups are tiny. It's not like it's possible to measure the size of a group which by definition is hiding to the best of its ability.
Somebody kidnaps and rapes a six year old? Yeah no, they are inhuman and just need to be taken out behind the chemical shed and shot.
There will never be any meaningful criminal reform in the US before the right recognize the existence of the first type of offender and the left the second type.