Actually those people are very much more pro-Italy than pro-Russia, so in a match Italy - Russia they would definitely support Italy (meaning they have nothing against Italy)
It's just weird that "Italy getting help from referees" is a theme that comes up at every water polo tournament apparently. I would say this whole thing smells a little
Again, I'm not blaming the Dutch results on the referees. They should have won the ticket in the Euro final in the first place, then they shouldn't have given away a big lead against Russia in a matter of minutes...