I’m firmly against the death penalty but Conor Friedersdorf has a perversely logical point here:
I can imagine one objection: that the guillotine is barbaric. But to me, that’s a point in its favor. Let’s have no illusions about what we’re doing when the state carries out the killing of captive prisoners. I imagine support for the death penalty would decline rather quickly once heads started rolling.
(Via Paul Kafasis.)