It’s never justified.

It won’t bring the babies back. It won’t stop her killing more babies any better than prison will. It won’t discourage other people from killing babies.

All it does is turn “murder is wrong” into “murder is wrong (unless I think you deserve it)”… and guess which of those most murderers believe?

A large number of people would disagree with you and they would be right to do so. Your opinion does not mean fact.

Nothing anyone does will bring those poor children back from the dead. That’s not the point of justice. The point of it is to fulfill what the people think qualifies as moral righteousness. It’s what the word actually means if you look it up in a dictionary, and for the majority of people, they believe the death penalty in cases like this is right and I for one can’t fault them.

The point of wanting her dead isn’t to bring the babies back. It’s to get rid of her, permanently, as they rightfully should. We know prison isn’t enough because others have cited the case of another baby murderer who is now up for parole and may be released, completely defeating the point of life sentences in jail.

murder is wrong (unless I think you deserve it)

And that’s how many philosophical schools of thought work, and they are quite honestly more valid than yours. Deontology is a terrible moral outlook and cases like this is why. We can’t have a moral and just society if we only judge morality by action and not by the circumstances of that action, who is affected, who commits it and why, etc.

What you’re asking for is actually unempathetic, cruel, and quite honestly really dangerous for the community.