We are going to have to agree to disagree. Sure, had Pouncy done that to a player with no helmet on I would support your position. Had he done it to a player that was uninvolved at that moment in any altercation or one who had no way of knowing it was coming, I would support your position. For me, and perhaps it is me alone, the act of charging a guy, from behind, a guy away from the fray, a guy without head protection, and knocking him over is worse. Now I acknowledge it is not a head attack, but it is the element of cowardice and victimizing the nonparticipant at that moment, from behind which I find more reprehensible than giving a guy who has something coming more or less what he has coming.
Now it does appear the league takes your position over mine, so you have support while I do not. Not the first time my moral compass has had me standing somewhat alone.