I don't know what the argument is about, the vast majority of red cards Madrid got against Barcelona were fully deserved and can't even be debated, plus they should have had as many deserved red cards that were missed by the refs.
Every single team in the world gets help from the refs. Barcelona suffered too from refs' mistakes (I still remember they were denied two stonewall penalties in the last minute against Espanyol and Real Madrid last season, which led to them drawing the first and losing the second).
However, what's pretty obvious to me is that Barcelona has really toned down their diving/playacting in the last 2-3 years. Not saying they never dive now (as any other team in the world do), but it's noticeably less than 3 years ago. I don't notice such a change with Real Madrid.
What's also pretty obvious is that Real Madrid complain a whole lot more about the refs than Barcelona.
And by the way, in the last game Madrid has definitely out-dived Barcelona imo, but the ref was pretty good and didn't fall for most of them.
i agree with you. i'm especially surprised with busquets... he hasn't really been a diver since probably the 2011 or 2012 season. He's really toned it down... alba on the other hand..