The author was trapped. He shared the document to the "skeptics" internal group asking for feedback. He didn't realize that the skeptics group had been infected by SJWs for years. They swarmed him. It was like dropping a steak in a shark tank.
Sounds like a company sponsored honey pot, even more ammo for an unfair dismissal lawsuit.
sharing idea's on a small scale is good for everyone, sharing controversial or reprehensible is inadvisable but forgivable.
Those that went public with it, or spread it in outrage need a damned good talking to at least.
but really, I'd say the guy has learned a lot.... it may even make him a better person, isn't that everyone's desire?