The death penalty and rehabilitation are necessities in the world we live in. We can't just sweep them under the carpet and hope our social deviants find God and become contributing sheep of the flock. The world isn't fair and it can't be fair. Innocents will be convicted and criminals will be set free. The blame is placed on arbitrary, textual laws which sit in capital buildings.
Some people think the death penalty is terrible, some think it's the only way.
Get rid of the trash of the world. That's not the important thing. The important thing is that our legal and justice systems work and are free enough of corruption that they actually work and lessen the chance of people receiving the wrong punishment sentence. Bribery is probably rampant in the courts, and most definitely lawyer manipulation is. Our laws are constantly being edited in order to accommodate exceptions to the rule, which in turn produce precedents which are hard to counter in a court of law.