Well he has betrayed them after all, and could be pivotal to City winning the title. After all he had no intention of playing for another EPL club, then signed with City on loan, which most didn't mind, only to find out he'd properly signed with them and lied to everybody about this whole NYC thing. I don't feel as hard done by as those fans, I don't think he's totally ruined his Chelsea legend, but it is disappointing.
Ah well, shit happens. It'll be interesting to see the crowd's reaction to him when he returns to the Bridge for City.