My opinion regarding the death penalty is that if it needs it exist, then the guillotine is probably the best way to carry it out. It's 100% effective, requires little skill on the executioner's part to use, and causes death extremely quickly with minimal suffering.
Taking someone's life is inherently violent, and it is cowardice to try to hide that fact. People claim that capital punishment exists to scare people into following the law. Well, what's more terrifying than a guillotine?