Use the leftist woke playbook against themselves. The claim of “we can’t incarcerate our way out of crime problems” (same in unison song from every woke city DA’s office), means we need the death penalty and prison labor forces to perform public works projects immediately. Warehousing them inside cages is not helpful.
If prisons are bad enough, and law enforcement is effective enough, you can. See El Salvador. But in cases like this, I'm all for the death penalty. Insane AND guilty should be a valid verdict. One could argue that in such cases as this, insane and evil are the same thing.
Yep. Want to fix things? Put capital punishment on the table for every crime in which the victim would have been justified resisting with lethal force: aggravated assault, rape, armed robbery, carjacking, etc. That doesn't necessarily means it should be applied in all circumstances, but give prosecutors the option of pursuing it, especially when the perpetrators demonstrate a track record of failure to reform.
After all, if a criminal perpetrates such a crime, they themselves have placed the value of the fruits of the crime above that of their own life. They only survived their crime by virtue of the fact that their victim did not, or could not resist with the force the law would have allowed. If a criminal puts a higher value on their crime than they do on their own lives, why would society have any desire to keep such a person above ground?