To be honest I have found Manchester to be one of the most accepting places in England for different races and cultures, definately not a racist place in my opinion. I think there's just a lot of stigmas like Moss Side is said to be rough...and many say that because it is mainly populated by Afro-Caribbean's. Saying that I walked through Moss-Side a few months ago very wary by what people said, and I was fine! I've been through worse areas in Manchester trust me!
In terms of Racism, I would rather be in Manchester than London...
My friend spent a night in a police station ... she is 4feet tall so very small and white...she was on a bus going through a mainly black populated area of london...three 6ft tall black guys got on the bus, grabbed her book out of her hand, ripped it apart and threw her off the bus, then proceeded to beat her up BECAUSE she was white and we know that was the reasoning becase of the comments said to her throughout.