If I was Ancellotti, or Jude or basically any other player at Real Madrid then I would be pissed off as well. There is really no reason to accept that and there should be something done about that. I do not know if they can appeal, not like they can get the points there is no way, but to cool down their anger, they could at least get the referee fired. I understand that it may not be fair to some people for Referee to lose his job, but that's how it works. Or at least, take down his qualification and make him manage some second division games for the rest of the season before he comes back, making him both earn less, work more and at worse places. This wasn't acceptable at all, nobody who made a mistake like this should continue being a referee without any consequences, he has to face some trouble at work.