Head slaps happen on every play of every game, just as holding and hands to the face. Every team does it, every player does it. Also, you cannot hold the Cardinals liable for Officials incompetence and call it SPortsmanship. Sportsmanship has nothing to do with officials making bad calls. (and I agree with you the officials were pathetic).
But all of that really doesn't fall under sportsmanship -- it falls under gamesmanship -- and is completely different from a played deliberately trying to injure another player.
When the play is over? In front of the ref? I know the difference between what happens on every play and violent blows to the head after the whistle blows.