Earlier quoted context omitted.
I'm quite confused by this. Is calling someone a "stinky manager" a personal attack? It's funny that we can't differentiate the person from his "job". I work with some shitty managers, but I don't hold it against them on a personal level...
Are you serious? If I told you to your face "you are shitty at your job" you don't see that as a personal attack?
That's not even the extent of it. Saying something in private face to face at least keeps it between 2 people. He posted it publicly for the world to see, so it's a massively bigger "attack".