I can understand it, but at the same time without the games many of our generation wouldn't have any interest in history whatsoever.
Whether it's better to know none of it than the warped impression the games give is another question. I think it's better that they give both sides of it, fact is that however nasty the Nazi party was, and the SS did some pretty bad **** - most of the normal soldiers (on both sides) were just young men, fighting because of propaganda and because they were ordered to.
But yeah, there were some pretty horriffic things in every war - I don't know how any soldier copes with it. Same goes for the lads coming back from Afghanistan etc.