My favourite war-games dont take a stance on who is right or wrong.
Best example is RO, who just shows combat in a realistic way (ie no bunnyjumping etc but an engrossing experience that sucks you in and makes you feel there) where there is no propaganda for either side.
There are just sides and roles to fulfill, and nothing else.
Another example would be Hidden and Dangerous 1 and 2 i think.
There the Germans are not portrayed as evil, just your enemy at hand. And they are not the only ones you face, but you fight the Japanese as well in Burma, all great atmospheric missions that are immersive and feel real without the need of showing Japanese soldiers doing beheadings or whatever.
Brothers in Arms, though not a realistic shooter, does feel authentic but also makes the Germans seem a bit evil more or less.
Not so in the first two games, but in Hell's Highway you see a girl dragged into a barn and being hung there for example, or a girl being shot on the doorsteps of a hospital, stuff like that.
Ofcourse, one doesnt know what these girls did: the one in the barn might have been a resistance member, which was very active in Holland back then. You just dont know, but seeing Germans do such things makes you hate them (though the girl in the barn is a real thing: it actually happened, they got the story from a veteran who is still troubled by it to this day.)
Now not game-related, but it is related in a way.
I want to say something about the book All quiet on the Western Front.
It would have been easy for the writer to say something about the French making them look evil. After all, they were his enemies in the war and he must have seen horrific things, and he has.
But yet all he talks about in the book is how someone in HQ made the French their enemies, while they could have been good friends, and "How could we do this to eachother, comrade? You are a man like me, why do they not tell us and make us kill eachother?"
In the book he just shows war, without really taking sides. He is ofcourse on the German side, but he doesnt make his enemies look evil, just the war and what it makes people do.
This is very important in games as well. Show the horror of war, and dont take sides. All sides do horrific things, but without war, nobody would have. It's a mindtwisting experience that kills off all human emotion just to survive.