I think ya'll are misunderstanding what the redcross is saying. I think what they are saying is pointless but its at least not as stupid as saying that video game players should be penalized for war crimes. They are saying that combat oriented video games are sanitized violence and they think that given how popular they are maybe if the violence wasn't so sanitized it would help people understand war crimes in context, as opposed to something the Narzis did.
The problem with their idea, as far as i'm concerned, is that the whole point of video game combat is that it IS sanitized. Who would want to play a video game that made you feel bad about playing? Imagine the law suits over video game caused ptsd.