The most important thing to do, according to the Left, is to focus 100% on the evils of the Christian West and America. The negative must always be front and center. To that end, if something or someone associated with the West or America does or is good, it is necessary that you find something - anything - negative to say about it nonetheless.
So Deacon Greydanus reminds us that justice may have been done in the Arbery case, but it wasn't done ... perfectly. That's the problem. Our generation, one of the most failed generations in history, can only lift ourselves up by tearing everything and everyone down. And that fits like a glove on the Left, that can only thrive by convincing us everything and everyone around us falls short of the mark at best, and are rotten and deplorable at worse, and therefore must be eliminated.