Although I suppose it might seem that way sometimes, he's completely wrong.
WHAT? YOU HAVE GOT TO BE KIDDING ME!! HOW CAN YOU EVEN SAY THAT????
Just kidding. It seems like a foregone conclusion, but if your environment keeps those "waiting to be offended" types away from you, I'm very happy for you. Some of us are dealing with them rather often. I don't mind- since I am a conflict resolution pro, they are my job security. Dr. Dyer has sold a few trillion books on the subject. He's considered to be an authority by a lot of people. YMMV