FWIW, I couldn't quite piece together what happened from that post, since he never actually gives a chronology, just a list of how Airbnb responded at some stage of the controversy.

Before your post, my best guest was that they damaged his apartment, costing him money that he couldn't recover, and when he tried to get Airbnb's help, they sent out word that he was uncooperative and got him blacklisted.