Gran Torino was set in a lower-class neighborhood. You may or may not have noticed the street gangs. Street gangs are not a feature of a middle-class neighborhood.
Everybody thinks they are "middle class". I am also sorry to break it to you that, evidently, you are lower-class.
Well, I am always willing to learn more about US culture, and if that, a district of detached houses with lawns and garages, was a lower class area the US is wealthier than I thought. Admittedly, it did look a bit run down, but I would have judged a lower class area as one with old, run-down terraced houses divided into apartments, and I've seen those in US movies too. The fact that street gangs were in an apparently middle class district was my point.
As for my being lower class, well, LoL, that's a very rash assumption about someone you do not know! I have been called a lot of things, but that's a new one. Keep then coming! No surprise though that most (not all) people think they are middle class because most people are middle class, in the UK anyway..