The term 'humanity' doesn't just encompass those things within our species that we like--it also includes those things that disturb us or can even destroy us. By recognizing these elements as being real, and acknowledging their perpetrators as human beings rather than folklore-level bogeymen, we can protect ourselves better and cultivate the more enlightened world that progressives and liberals supposedly endorse.
This makes absolutely no sense to me, sorry; not trying to be rude. The death penalty is NOT about bad people who "disturb us or
can destroy us". People on death row have ALREADY done the murder. Treating would-be murderers in ways to avoid future crime is a noble and good idea on which millions of dollars are spent every year attempting to accomplish, so if that is what you are getting at, I would agree.
but the notion that somehow we protect ourselves better by treating hardened killers with kid gloves is to me the opposite of enlightened...it's burying one's head in the sand.
I actually am not so much in favor of the death penalty, not because I think those who get it do not deserve it. They do. However, I do not like the effect it has on society in that it continues to validate reasons to take a life, such as with abortion or assisted suicide etc. Instead of killing murderers who deserve to exist in the hottest corner of hell, we should place them in the most uncomfortable sort of prison for life that can be imagined.
Remember, the murder rate was FAR lower when murderers were afraid of the consequences. THEY were enlightened to the fact that if they do horrific crimes, the electric chair or a horrible prison was awaiting them.