No... what he actually said was
At this point, it simply comes down to a matter of opinion. We don't know the "backstory"; maybe she has on repeated prior occasions seen the instructor in question doing exactly the same thing, and has on those occasions responded by quietly taking him aside and talking to him. This time, though, she lost her temper and decided, as the above quote suggests, to "call him on it in front of his students". I'm not saying that's what happened, I have no idea. The question is, is there ever an occasion when it's justifiable to berate an instructor in front of a class. Personally, I don't think so. The professional thing to do is take them aside, and if that doesn't work, talk to their supervisor/boss, agency, or the owner/operator of the location where the incident occurs.
I've had occasion to have a quiet word with a fellow instructor, and choosing to do so in a forthright but professional manner makes a huge difference; rather than the incidents blowing up, the other individuals have uniformly thanked me for according them the courtesy and respect I showed them, and acted responsibly. I'm not so naive as to think that this would always be the case, but it's certainly my default.
To each his own.