Video games are the current boogieman, and it's international. Blaming video games is a way of avoiding serious societal issues. It's nice for a lot of people to delude themselves into thinking that they can prevent terrorism by taking away their training tools, rather than having to put insane amounts of blood on their hands to destroy the cultures involved (though this is an entirely differant discussion). Video games are blamed for most of society's ills today, and they are not the first thing to be put into such a position, nor will they be the last as the central problems are not going to go away no matter what anyone does.
On the other hand, those of us defending video games also have to be realistic, and acknowlege when they other side has some legitimate points. I doubt "Modern Warfare 2" inspired this, and even if it did it's no worse than any other work of fiction that inspired real world events (like the book "Hijacked"). It is true that shooter games can be used as part of a training process. It helps with visualization, and developing tactics and an understanding of what you are trying to do. Our military in the US uses FPS games as a *part* of training, and so do a lot of other armed forces groups. Indeed one of the selling points for some games like "ARMA" is that they are hyper realistic, and were developed as training tools. It's hard to deny that the terrorists involved probably did train with FPS games, because almost anyone with combat training and access to the technology probably did. Terrorists are not stupid. I'd imagine like a lot of groups these guys probably did the FPS games while working out and practicing physical skills, and also doing things like paintball (which is another common training exercise).
As far as demonizing the Russians in games goes, well they seemed well on the path to reform, but they have themselves to blame for their return to popular consciousness as the bad guys. Ukraine, Georgia, threatening Poland, cutting off fuel to the EU... it's not exactly unwarrented. As someone pointed out though, "Modern Warfare 2" did have a differant justification other than the Russians simply being douches for the sake of being douches.