If you think that capital punishment is not biblical or that the Catholic Church doesn't approve of it, disabuse yourself of both notions. "Government-sponsored killing", as you call it, not only assures society that this particular criminal will not kill again, but it expresses the retribution of society at the heinousness of certain crimes. Nobody forces anybody to work in the death house; in Texas, the person who pushes the buttons releasing the lethal chemicals volunteers for the job, and there is a rotation.
As to a mistake, I've asked numerous times on this forum for proof that a mistake has EVER been made, and nobody's been able to document a single one. I'd challenge you to do the same.
The criminals should be forced into hard labor. They should repay society with this labor, but not be sacrificed in the electric chair.
Dangerous criminals are not allowed to work in most prisons, as they cannot be controlled adequately.
No state in the union uses the electric chair any longer to my recollection. Lethal injection is an extremely humane way to carry out society's wishes.
There is a huge difference between innocent life taken in abortion and the life of a criminal taken by capital punishment.
Not only is there a qualitative difference but one hell of a quanitative one as well. I believe there have been approximately 1000 executions in the US since the Supreme Court reinstated the death penalty while there will be over 3000 abortions today alone.
A nation whose legal system can produce things like Roe v. Wade, a Clinton presidency, and an OJ jury has no business even putting people in jail, let alone executing them.