Do you then see it as a coincidence that the "poor calls made by human beings" are happening so often on Barca matches and in their favor? I challenge you to find 2 such cases in the last years in CL knockouts where the managers were angry at the referee and blamed him for their defeat, which didn't include Barcelona.
You say that Mourinho is the drama queen here who exaggerated and looks for an alibi, but in the last 4 years, only in the CL knockouts, Ancelotti, Hiddink and Wenger were fuming too at how the referees robbed their teams when they played Barca. Mourinho is just another one on the list.
Even normal people didn't blame this on UEFA in the past, simply because there were no grounds to blame UEFA after one or two matches. But now we have more data, more reasons to suspect that Barca getting so much help in decisive moments of the matches isn't a simple coincidence and "poor judgement by a human being".
Personally, my suspicions started after Chelsea-Barca, they were growing bigger after Motta's red card and I was convinced when three Barca and 0 treble winning team players made the ballon d'or list. Van Persie's red and the help Barca got against Real were simply confirming what I was thinking.
But for some here, obviously, Platini himself can admit that they were helping Barca on purpose, and they still won't believe it.