If there's good reason to I definitely don't weep for the losses.
By good, I mean good, can't be that they annoy you or because they're being dicks.
I mean, rapists, molestors etc. Nobody would miss those disgusting fucks.
When to kill? On a Wednesday at exactly 7:40 pm . You will be satisfied.
But for real, I guess people just lose it. You know? Like, a girl leaves him, he loses his mind. He goes after her. Grabs her by her neck. Asks her uncomfortable questions. Suffocates her. Watches her. Rapes her. Burns her. Rapes her again. Roasts her. Eats her. Then, he goes on with his life.