Many a time, I think the word "healing" is misused in that context, and what's actually sought is "closure" instead, the idea that the narrative has ended, the good people have won, and therefore victory can be claimed and everyone can go back to feeling like they're good people and the people they opposed were simply misguided and without their leader, they won't be able to cause any more damage. (Which says they don't understand how deep everything goes and/or their own role in it, but that's a different discussion.)

In the context of -ist behaviors, I have seen a common refrain that separates "do" from "be" and that one of the skills to learn is how to separate the two such that you can hold the idea in your head that very few people want to believe they are a bad person, and yet they can do bad things. It comes with the extra benefit of being able to say that bad behaviors can be corrected and fought without it meaning that a person themselves is bad. So, as above with the quote that says the best way to help someone being an oppressor is to stop them, it is absolutely an act of love to stop someone from engaging in bad behavior.