I thought it was a red also van Persie was offside for the own goal and Rafael had a handball on the line. United fans shouldn't be complaining.
1. Punctuation is your friend.
2. Did RvP being offside (if he was, I don't recall) affect the goal?
3. Referee had a bad angle for the Rafael handball. Sound familiar?
4. We have every right to complain. That call changed the match. If your club got shafted on such a questionable call, you would be complaining and 90% of this board would be complaining. It's just that United gets calls a lot, so people are more eager to defend the call.