The minutiae of the various calls hardly matter when the run of everything is in United's favour.
Two penalties, United's call given, Liverpool's not.
Two players go in dangerously, United's man unpunished, Liverpool's sent off.
etc
It has been very hard for a long, long time to get the run of the refereeing against Ferguson. No other reason at all why they wouldn't be going home with 1 or 0 points instead of 3.
Just imagine if we get similar decisions against City, we'll definitely be accused of stealing it.