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The world wars were different to today's terrorist fights. The both sides in the World Wars (for the most part) observed various conventions of war (exceptions were, unfortunately, also present). The men and women fighting weren't generally speaking fanatics, but decent people, and fought because their country called them to, not because they hated the enemey.
Various actions (World War I had cease fires during Christmas, both sides got together, some played footy, had dinners in middle of the battlefied, etc). How does this go on-topic? Well, I'm actually against medics in games carrying weapons, not so much on a game-play perspective, but as a matter of respect. I've no idea how armed forces are today (I could find out easy enough), but it used to be that chaplains and medics were unarmed. So I agree in that a red cross emblem should be used in a more neutral fashion - I read the article and actually agree that the use of the symbol in games may lead to misconceptions about the ideals of the Red Cross, and can understand why they wouldn't want it used.
That's my second lot of 2c anyway!