Why I don't
I'm not opposed to the death penalty on moral or constitutional or psychological grounds. There's low-lifes out there I'd gladly volunteer to throw the switch or squeeze the trigger on myself, without the slightest compunction. But the truth is that too many people who deserve it don't get it, and too many innocent people are executed in error. The criminal justice system is just too broken to trust it with this authority.
I find it baffling that so many people who don't trust the state to collect taxes or regulate businesses fairly are so eager to give it that kind of power.