No, and I frankly don't understand why I should. But I understand the family's reaction. If it were someone close to me who was murdered by some bloodthirsty fool, of course I'd want to cry out in pain and exact revenge. But the reason we have a system of laws is to separate one's immediate emotional reaction and allow society to say what is the most constructive response. And society, it seems to me, is far more positively served by having a system that puts that individual out of society for the rest of his life.
Nobody's against punishing people for a crime.
I think to stoop to the level of a killer, however, goes beyond punishment to the point of degradation. I talk from my perspective and they talk from theirs. A number of them I have met are inordinately bitter, angry, frustrated people. Some have taken their fury at what has happened to them personally and made it a kind of reason for being. I have great empathy and sorrow and sympathy for the plight of these people.