Why do liberals oppose the death penalty?

I would love an answer why. Because I just don't understand you liberals.

You fight for women's rights. You fight for minorities' rights. You fight for homosexuals' rights. You fight for animals' rights. You fight for trees' rights. 

But you won't fight for the rights of the unborn, or the rights of the murdered. 

How can you possibly claim to strive to fight for tolerance, peace, and equality for all when you won't even stand up for aborted human beings and innocent people murdered by evil killers. On the contrary, you strive to fight not for the victim but for the victimizer. 

"Capital murder"? No, it is a fundamental concept called JUSTICE, which human beings have understood for thousands of years of existence across all continents until you sprouted up in AD 1960. Your new breed of human can't seem to fathom this simple principle.

A twisted ideology for a twisted breed.