Sadly, this is more symptomatic of the problems in Argentine football as a whole. It has the best player in the world but arguably the worst fan and player culture.
Putting aside the assault, I was equally shocked by the lack of empathy by the Ferro (Greens) team after the punch. It borders on contempt from a couple of them. One does realise the gravity of the situation and drags the offender away and another seems genuinely shocked but perhaps that was more to do with being a secondary hit in the incident. The rest just walk away and offer no help.
Incidentally, the player who threw the punch is a brother of a Fiorentina player.
Thankfully (I think), the ref remembers nothing of it.