Fair point although one could argue he said to get Klopp off his back!If he had just given the yellow or red, and said nothing, that will be that, no issues either way. But he has to say what he did, which showed a level of emotion. He should be refereeing based on facts and rules, not emotions. It's unnecessary, made worse by the fact that they had a history. It's up for interpretation yes, but it should never be.