I don't understand all the hatred towards Nasri, I doubt many players in this squad have tried has hard as he has to make himself something at City (whether that's good enough is a different argument) I think his determination is what leads to the shows of frustration. However other players have done the same like Yaya did against CSKA and a few seasons ago where he tried to knock Mata's head off at Chelsea, Sergio also committed a pretty nasty tackle against someone last season I think yet no one has called for these players to be sold for the same reasons.
I fear that Nasri will always be a target for fans who don't appreciate the effort he puts in (the same with Navas and Kolarov) I think he will be a player that will only be truly appreciated once he has left. Just like we have always done with players in the past, I think some people need to get behind him rather than slag him off because of 1 or 2 incidents or bad performances.