I dont know if I would call the guy a guido. He's from Pennsylvania and his last name is Pedevill.
Supposedly the guy was talking during the match, but not during the volley/ points and then woman got in his face about it. Yeah, he escalated the situation but you can't slap someone across the face repeatedly and then have your dad jump in.
I would say both sides are wrong, but I don't think the guy acted that outrageously.