He could have been a little more tactful.
Tact:
The ability to tell someone to go to Hell and make them feel glad to be on their way................
LOL, I would have gone Basil Fawlty....
“Well, stay where you are, because obviously, if there was a fire, you’d all be standing down here like this in the lobby, wouldn’t you? I don’t know why we bother! We should let you all burn!”
LOL
I think it is not great to lose your cool in a well paying service sector job :)