I would put this down to stress. Mr Mourinho has been living like a tramp in a Manchester travelodge for over 12 months now. A home defeat to, quite literally it seems, their noisy neighbours has obviously tipped him over the edge.
Well, that and the fact he can't build a title challenging squad anymore.
The guy is a clown. He should care more about him team than any other. Perhaps it is that since he first came on here (10 years ago) the Woolwich boys have never won the EPL, in fact he was 14 years old since they last won the title. I think Chelsea and us have won it about 5 times each since Arsenal in 2004.
I guess it is understandable how paranoid one might get if you can see another year go by without a title. :)