>> until he dies as far as I am concerned

Fortunately, the justice system is not concerned with how you feel about it either. It should assess prisoners purely on their current state and their current danger to society, not on how their victims feel 31 years later(and that should work both ways - someone shouldn't be kept in prison because their victim feels that way, but they also shouldn't be released early because their victim feels compassionate - justice should be blind to both of those).

The justice system is concerned with how I feel. That's why every three years I file a victim impact statement when the killer applies for parole. The review board expressly cites these statements as one of their reasons for non-release.

Exactly. I’m convinced that this new “death penalty is so horrible” movement has kicked into high gear only because crime rates are low enough and society is segregated enough that many people don’t know any murder victims.

Look at other societies and ask yourself if your type of thinking that drives societal thinking may actually be part of the cause in creating these "monsters". Why are homicide rates so much lower elsewhere (say Europe)? What is it about American society that creates this?

I'm in that movement because of extremely high rate of errors.

That's a reason I respect. The "compassion" angle is one that I don't.