I think all the allegations are a bit over the top, especially the ones about "Aussies are cheats", and "Aussies doing anything to win".
Yeah, it shouldn't have been given out.
Yeah, by looking at the replays it looks as if Haddin had to of noticed that something was wrong.
But the fact of the matter is, that in the heat of the moment he obviously didn't, and if he says that he didn't then all we can do is take his word for it. Maybe he was unsure at the time, but the umpires said nothing and he was well in his right to claim the dismissal, even if his celebration was a little bit over the top for something that was so marginal. That probably had to do with the situation of the game more than anything.
So all this talk of it being deliberate is a bit over the top, IMO.
Just let it go, in the end it didn't effect the result, and can be forgiven. It's the umpiring that needs to be looked at here.