There is no animosity against Argentina, it's just the complaining starts when calls go against a team, when they played Venezuela there was a clear penalty and two hand balls in the Argentine area that weren't called , so would that mean the referees were against Venezuela?
As for Messi being sent off, he pushed Medel without the ball in play and it was out of the field, he tried to fight back when Medel started pushing him but I think he got scared.