I disagree you need to forgive anyone else in order to heal - I’m not saying you can’t if you want to, but I’ve found letting myself be angry, then dealing with that anger in a cathartic way, has been more helpful for me than forgiving my abusers, mostly because said people got pleasure from hurting others and had no desire to change.
I’m not giving into the “be nice, because being rightfully angry makes the perps uncomfortable” social conditioning.