I was actually hoping someone would ask me this. Haha.
I think especially Voldemort. I mean, think about this. He lived his entire life without love. Without knowing what it’s really like to love another person, be it romantic love, or platonic love, or friendly love. He had no idea what that was like. Now think about your life. And think about who you love. And imagine not knowing that feeling. It would suck.
Voldemort did what he did because he had to fill a void. He filled it with power, and yes, it was the wrong sort of power, but that’s because he didn’t really know any better.
This is going to sound really sadistic, but I’d rather someone rot in jail and think about what they did than be killed.