The first ammendment protects citizens from the government infringing on their right to free speech. People are allowed to ***** about something in a video game if they want to. And that's all these organizations and citizens were doing: bitching about a feature of a game. The government wasn't trying to prevent them from including this feature in the game. It was EA's decision to cave. There was no violation of the first ammendment here.
If people are allowed to say whatever they want, then citizens and organizations are also allowed to say whatever they want about what was said. It goes both ways, guy.
For what it's worth, I thought that the choice to put the Taliban in there as a playable faction was in extraordinarily bad taste, especially since it was so obviously a ploy for attention to make the game "controversial". On the other hand, removing it once you announced it is pretty lame, but I don't think it was ever there for any "artistic" purpose. It was attention-whoring, plain and simple. Don't back down from your "controversy".
For the record, your confusion between the first and second ammendments is all on you. No one else is at fault. Own your mistake. The assertion that "every other contitutional argument is made over the second amendment" is patently ridiculous. Just say, "My bad," and move on. Don't try to put your lack of knowledge of the Bill of Rights on someone else.