I ignore your point because you have not addressed my initial point: when confronted with the choice of death or continuing to kill, these perps stop. Thus, the penalty of death deters crime.
CAUSE: The immediate threat of death.
EFFECT: Perp stops.
Have a nice day!
No I HAVE addressed your point. What you’re ignoring is there’s a big difference between death and the death penalty. Death is now, death now is a deterrent. The death penalty is maybe death 20 years from now, a time frame most criminals don’t expect to live long enough to see anyway, not a deterrent.
Heck you even almost admitted it. Notice your cause is “immediate threat of death”, there ain’t nothing even remotely immediate about the death penalty.