There's a big difference between misjudging a foul and ignorance about a fairly basic law of the game. Particularly when it seems that the fourth official was trying to help him out. That's what the fuss is about.
Whatever you think about their competence, referees at that level are dedicated individuals, and the bloke must be feeling crap. He will have devoted a major part of his life to reaching that level. Luckily for him, it didn't affect the result.
I think you've took what I've said a little too literally
What I was trying to point out that no one seemed to of mentioned from the few pages I read was that it wasn't a penalty in the first place.