I know that kali and shiva make up the destroyers in Hinduism. From what I've heard, shiva makes people realize what they've done wrong. But the question is that do they punish you in order to teach you what you've done wrong. How do they cut away the bad in people, is it through life lessons? Do they make us realize by letting us experience bad situations? Do they bring out the bad karma to teach their devotees?
I'm sorry I don't know much about Hinduism.