Should kids who kill be executed?

If you're going to lock these little s up for the rest of their lives that's practically a death sentence in and of itself,so don't you think its silly not to execute school shooters simply because of their age.They're spoiled brats who aren't getting their own way and they're taking it out on they're victims.I saw one in a courthouse once and he was crying going like "It wasw like no one cared"and I was like "I dunno what yer cryin about you weren't the one who got shot"Man I wanted him to be executed.