Seems before they could just handle the situation fine with trolls etc, while providing a facade of 'free speech'. The comments however, have become such a burden due to more general awakening and the public being aware more of the trolls and troll techniques that they closed the whole parade.
As an example of trolling by the way :http://www.commondreams.org/hambaconeggs
Then there are the paid ones, etc.
So far what seems obvious that u.s. is trying to encourage racial division/conflict internally and an entry to get involved militarily in iran outside.
I mean syria.
at least that is what I see as the intentions, nonetheless lately they seem to fail.