It’s generally accepted that players should show the referee total respect, but if you ever hear the audio from a game then you’ll know that that they’ll all happily swear at each other.
It means that you really need to go the extra mile to get a yellow card for dissent, so you have to wonder what Zlatan said here:
A straight red card for Zlatan Ibrahimovic! ?
Out of nowhere, Milan's star striker has given Parma a lifeline ? pic.twitter.com/OGB0IaFmiZ
— Watch ElClásico live on Premier Sports ? (@PremierSportsTV) April 10, 2021
Refs will often show a red if their impartiality is questioned or perhaps if something particularly vile is said about a family member, but Zlatan does a fine job of playing innocent here.
Hopefully a transcript does come out from this, as it would be fascinating to know what was said.