I agree with Chester... it doesn't look good humiliating someone in public even though they might be doing their job too well.
Thing with Klopp though is that it doesn't seem to be personal. He lets his emotions get the better of him sometimes and in this case he was annoyed before he cam into the press conference, but once he's calmed down he'll apologise where necessary and he doesn't seem to hold grudges.
I suppose none of us are perfect and we could have much worse ... like you know who!
The journalists main objective seems to be embarrassing the managers especially after a game. Take for example a controversial penalty, they just want the manager to get angry and swear at the official. The more emotional the manager the happier they seem to be as they want to get get their headlines.