We all have heard that hating, holding a grudge, and not forgiving isn't a good thing, right?
But why? Because it's not nice?
Why should I love someone who acts in a way which I don't approve of?
Why should I have positive feelings towards someone who is causing harm to others?
What's wrong with having negative emotions towards others? It doesn't hurt them. They often even don't know that we hate them. They sometimes don't even realize we exist!
And that's precisely why.
They sometimes don't even know you exist! Hating them won't change their actions. The only one who suffers and whose life is affected is you.
One of the participants in my recent meditation workshop put it pretty nicely - "It's like you are drinking poison and expecting your enemy to get hurt."