It's fairly well understood and accepted that hanging onto resentments is unhealthy and counterproductive. Unless it's social justice, then it's totes legit and sound policy.
"Social Justice," as proposed by practitioners of Liberation Theology, BLM, SDS, various professional speakers, etc that propose a system of reparations and renumerances and other actions on individual and cultural levels for the "correction" of past cultural and systemic wrongs, real or imagined.