Sometimes it's just baffling to read comments in here. It's like people are seven years old or maybe it's only the ones that never played origanized football in a proper club that write these utterly baffling comments. Rojos tackles last year were, some of them, clearly red card tackles that would put his team in problems if the referees would give him the well deserved red card. He got away several times. This was something completely different. There's no defender, let me repeat that, no defender, that plays or has played in Premier league that would regard that as a bad tackle.
As the last defender, with another Brighton player running past the rest of the United players, you have take some precautions which he did without risking a redcard.