There is also nothing to suggest that the ref had no right to show a yellow card. It was his decision, he could have let it go or punish the player. He chose the latter and noone should be mad. He did the same to the Bayern player a few minutes later.
The point is there is absolutely nothing scandalous in the card and some people are trying to portray it as a terrible decision.
Well if the vid is not enough I don't expect anything to change the minds of some people here, therefore please continue the holy crusade against the ref.