I got a season ticket for many years in Barcelona so i am totally objective lol
still I have to say it was a yellow card for dangerous play and not a red one.
On the other side though, Ramos and Diara should have been out from the first half and Pepe,well Pepe should be expelled from football forever. Just watch the this video:
https://youtube.com/watch?v=1udX3lZerPc