> 15.3 “Enemies” within the context of a game cannot solely target a specific race, culture, a real government or corporation, or any other real entity.
If you could play as both sides it seems like they would allow it. While this rejection seems irrational, I don't think the point is that Germans and Russians are targeted, but that they are depicted as the only enemy.
Every conflict has at least two sides, and it's unthinkable that any game doesn't offend a group of people. However, it seems more reasonable that they should require "fairness" in the sense that both sides should be playable. This takes a game from having a perceived ideological stance to being more neutral, and I think that's the whole point here.