The death penalty neednt be cruel like slavery or whatever - please try and think and not ibntroduce nonsensical strawmen. - if you put it that way you are actually on the slave herders side in this argument.
Think more deeply about this. I'm not equating death penalty to slavery, for they have many differences. I'm merely pointing out the historical trends against violence, and the death penalty will one day be seen as the act of barbarism that it is.
This is not a nonsensical strawman, but a serious historical parallel. Two hundred years ago people laughed at the idea of slavery being cruel, for slaves weren't considered to have the same rights as other people, or even the same feelings. Today we have serious and intelligent people who seem to feel that rehaibilitation is impossible, and they want to react, not think, each time a life is taken. That is no way to have a civilized society, and any society built on violence will fail (eventually).
I hope your barbaric world where sadistic murders are rewarded never comes to pass.
It will. History is on my side.