[Z]

I don't know how I'd feel about the murder situation but I know that with stuff like people falling out; holding a grudge over it means you've never truly moved on from that situation. It feels like a weight's been lifted off your shoulders if you forgive someone rather than hate them forever because of something that happened in the past. What happened cannot be undone, but you can rewrite the ending of that relationship with that person, whether it's a friend, a family member, a former partner or even a near stranger - if somebody has wronged you, your instinct is to protect yourself and hate that person for what they did to your life; but truly letting go of that hatred means you can 'heal' again properly, constantly holding onto the past in that way will just hold you back I think. So yeah if somebody murdered a member of my family the grief and hatred would probably last for a very long time but ultimately you need to somehow make peace with that situation or you'll never be able to lead a normal life again.