Yeah, I was scratching my head also over this. Why not model some cheap soviet tanks and some red army soldiers and call it the day? DICE must have known that many, with just a little bit of knowledge of WW2, that Americans were not in Berlin in the final days.
I do not understand the notion, that if you want to play as Nazis, you must be a sympathizer. Does enjoying watching The Undergang (Downfall) make someone a Nazi? A Nazi perspective has never been done in a video game, and it is sad that DICE chooses the easy route on this. Of course, we have yet to play it, but we all knew it after The Last Tiger was revealed how it was going to start, and how it would end.