Warwick, "Football Etiquette" is a very relative thing. Plenty of people here seem to agree that if NGD did with his daughter's rug what you say he did, that it is something they would prefer not to have in the Zone. However there also seems to be a general consensus that even if you were as polite as you claim you were to NGD, that your actions were probably not justified. It would seem that you have broached what others think is proper etiquette at a football match (or even in life in general), making you at least as guilty as NGD.
It is good to see that you acknowledged that you may have taken the wrong course of action, but your constant reiteration of your view of events isn't helping your cause. You might feel that others are misrepresenting events and your motivations, but you might be best off letting the conversation die down so that we can leave this regrettable incident behind us.