The stupid little fuckers got what they deserved, praying on the weak like that. That's why you don't fuck around with anyone. Anyone can pull a trigger and exercise street justice.
Totally deserved. I think it's always justified. You don't accidentally break into someone's home, and no one knows what an intruder is there to do or if they'll be back. That's why it's important to make sure they don't return like in this case. Fuck the family of the deceased too. Lick your wounds and raise the rest of your shitty children right.