When Jesus talks about loving your enemies, being good to those who are mean and nasty to you, He wraps it up with “be merciful as your Father in heaven is merciful.”
This is great. The best way to get people to be nice is to remind them how nice it is when others are nice to you. Especially if the others happen to be God, who could smash you if He felt so led.
Mercy is a great deal. Showing compassion to someone. Giving them a break even though you deserve to be offended. Instead, you decide to back off revenge, gossip, witty retorts, etc and just “let it go.”
That’s mercy. Let it go. Furthermore, go out of your way to show them compassion. Be nice. Let it go and be nice. Who could have a problem with that?