This seems to me like a classic case of people complaining about video games with no idea of what they're talking about. They say only Italians are shown to be in organized crime? That's funny, because as I recall the Italian mafia played just a small part in GTA IV alongside Russian, Albanian, Jamaican, and Irish gangsters.
Not to mention that GTA IV was a lot more mainstream than Mafia II, so I would think it'd be hard to miss that unless they actually did absolutely no research into their claim that video games only portray Italians in organized crime and went ahead and started a whole issue based solely on ignorance.