I have to admit he's got a point. Football fans often aren't the smartest people, specifically during the actual games. Al lot of them will do dumb shit: heckling refs, opposing players, opposing fans, etc... Skin colour being just one of the many things that they can "choose" to single out.
Incidentally, I remember the "Se saltelli, muore Balotelli" situation. Early on when it started, 80% or more of the fans in our stadium actually participated with these chants (I would know, I was there). And no, I didn't participate because it's dumb, but at the same time I don't get what all the fuss was about either. I mean, take it for what it is: dumb crap being shouted by (opposing) fans.
Disclaimer: I'm not saying there's no racism issue in Italy or Europe, but it is far more complex an issue than people venting their frustration or ignorance during a football game.