There are so many reasons for violent incidents that we frequently witness them even in wealthy countries like the US and Scandinavian countries. Even here, we can see the fragility of individual and societal vulnerabilities. As you said, violence is at the core of human nature. Educating people, raising awareness, and increasing punishments can reduce violence, but they won't completely end it.
I think the punishments won't have much effect in a population that is becoming increasingly nihilistic anyway.