Van Persie should have been sent off for bitch slapping Dani Alves. And Wilshere should have seen red with all his tackles.
The penalty was a clear one. If there is a real man out of all the Spanish pussies playing with Barca, it is Pedro, today he was honest and didn't fall down easily, and in the first half he could have won a penalty but he stayed on his feet and didn't dive.
Mascherano is a hero and a half, love him or hate him but he saved Barca's arse towards the end.
Messi's goal is

and the build up for Xavi's goal is

x100