Just after the game finished many Real Madrid fans started attacking Barcelona because of their playing style they said Barcelona was defending during the game all the time and they didn't deserve victory at all because Real Madrid was controlling the game more than Barcelona and unlike other El Clasico we usually saw real Madrid had more successful passes comparing to Barcelona while the most important thing is the result this game is which Barcelona could bear Real Madrid even without players like Lewandowski and Perdi.
It should not be a big problem caused by we have seen how long the rivalry between madrid and barcelona have been going on. The same thing gonna happen once barcelona lose against real madrid and then its fans will be mocking barcelona as well. This is normal in football once fans from madrid was mocking barcelona due to its play style is pretty much the same like parking bus strategy that used by some clubs in the past.
To be honest, if it's really entertaining to see that how the fans between real madrid and barcelona are mocking each other.
This is a common thing in the football.