One could argue the same thing abut pejoratives and ethnic slurs on the Internet. None of people posting youtube comments ever think about the issue of using ethnic slurs, nor what they actually mean. If a person did think of what such words mean, they are surely smart enough to conclude in not using them.
Yet... I think it is good that people do point out the inappropriateness in using pejoratives and ethnic slurs. It marks a social standpoint, which instructs people in what is acceptable and not acceptable. Same goes for propaganda messages in games.
I think a better analogy would be someone accidently telling deaf kids that "saying <ethnic slur here> is awesome" while giving them candy. The deaf kids doesn't pick up on that and the person probably doesn't realise what he is saying anyway because he just wanted to give kids candy.
Activision doesn't care about sending out propaganda, they just want money and do so by bringing out action games with ridiculously bad storylines that a lot of players probably doesn't even play.
Yet... I think it is good that people do point out the inappropriateness in using pejoratives and ethnic slurs. It marks a social standpoint, which instructs people in what is acceptable and not acceptable. Same goes for propaganda messages in games.