I don't support the execution of the Uvalde shooter.
What does killing him accomplish?
Justice? Not really.
Restitution? Not at all.
Vengeance? Not really.
Deterrence? Not really.
Closure for the families of the victims? I suppose.
I don't know about this case, but some families of victims oppose the death penalty, even in the case of the murder of their children.
Some reasons for this view could be religious beliefs, or the view that death is the easy way out, or the deterrence value of being able to point at a person in jail, or the potential for the person to do some good in the world.
These people would object to closure for them being used as justification for killing their child's murderer.
It's not fair to victim families to make them choose life or death for a murderer. It would be a decision they'd have to live with forever. We can't do that to them.
My opinion is that capital punishment should only be used where a person guilty of a 'capital crime' can't be reliably imprisoned.
Ie I'm not sure Iraqis were wrong to execute Saddam Hussein. I don't think it would be wrong for countries that struggle with corruption in their penal system to execute cartel leaders (that have been convicted of 'capital crimes'). War crimes, insurrection leaders, that sort of thing.