I watched it all. It was simmering, but I felt it turned when Roma's penalty was over-turned. The ref could have and should have given a yellow early on when being surrounded by players, but didn't, so it continued.
The 4th official was given a hard time, and there looked to be opportunity to give more yellows to the bench. Second yellow and they're removed, meaning the problems with the bench gets reduced, but he didn't, so it continued.
I wasn't sure the ref was in control. He should have shown he would stand no messing, but didn't.
However, Jose Mourinho should get a ban for his behaviour.
I reffed in the Alliance for a while, and didn't have any problems. However, before the start of each game I always spoke to each side separately to explain I wouldn't stand any messing.
Kids football was slightly different. The parents don't realise their kids can be banned for their poor behaviour. But as a junior football manager, I always made parents aware of that.