Given the amount of abuse players take it’s probably a miracle that this type of thing doesn’t happen more often. Of course the most famous example was Eric Cantona but a German player absolutely lost it last weekend.
He was originally sent off for throwing a punch at supporter, but once he saw the red card he absolutely lost it and had to be restrained by an opposition player.
Expect a lengthy ban to follow:
Red card after attacking a spectator. Happened in a German amateur league this weekend. from r/soccer
Admittedly the spectator needlessly makes it difficult for him to get the ball back but the player has to be more professional and not behave like this.