In the same game, Utd's Chris Morgan inflicted a tackle on Barnsley's Chris Hume that was so severe it fractured Hume's skull. Hume almost died, and for a while it looked like he may never play football again. Morgan was given a yellow card in the game. He hasn't apologised to Barnsley or Hume for the horrific tackle - which is really unpleasant to watch - and neither has his club. The FA quickly confirmed that no further action would be taken against Morgan or Sheff Utd.
So as far as the FA is concerned, it's a more serious offence to have harsh words with an official than it is to almost murder an opposing player.
The Fucking Arseholes.