There seems to be general shift, that was certainly evident in the World Cup, by Referees to avoid blowing up too quickly and letting play develop. The only problem with this however is that it can then move quickly into the next phase of play and things turn against the team that perhaps was suffering the initial infringement that the referee considered not too serious to blow up.
I think that this happened twice against us yesterday. First Aguero was being nibbled at but still appeared to be control. The ball then ran away from him and Aguero then pulled up wanting to complain (rightly or wrongly so) whilst play quickly turned against City. Now with the hindsight of knowing City would concede almost immediately I am sure he would have called the initial foul.
Believe me, as a Referee myself, your priority is to avoid making calls that lead to controversy. In short it's easier to blow up at any infringement during an attack than it is to let play wrongly develop only to then get it in the neck from the defending team who concede a controversial goal. Yesterday Clattenburg got it wrong because he never saw the potential for play to switch and City concede.
The push on Kompany again would have not been even noticed if 2 touches later the ball wasn't sailing into our net!
These things happen in fast moving sport and I don't for one moment consider Clattenburg a cheat although his courting of player popularity and daft haircuts do annoy me.
Time to move on and not slip into the oppressed moaning mode we have witnessed for years with Wenger, Mourinho and Ferguson. Slightly disappointed Pellegrini got drawn in to discussing it as his cool head has been part of his appeal to date.