For the record, he cited several things:
That the tackle that led to Diaby's meltdown should have resulted in a redcard as well, hence 10v10. (Arguable)
That one of Newcastle's PKs was the result of a questionable call. (The game announcer said as much.)
That Arsenal failed to maintain composure and make plays, even 10v11. (Absolutely.)
The one thing many fail to mention is Tiote's volleyed wonderstrike.