I don't agree with this. I think both Manchester clubs had a pretty good record of standing up to racists in the 70s. The National Front never got a foothold in the City of Manchester and both clubs had significant numbers of black and mixed-race fans in the 70s. I remember City and United joining forces to battle Leeds fans for example and also against Everton/Liverpool fans at the FA Cup replays. I have only ever seen isolated incidents of overt racism at City and even then it was quickly shouted down. The worst clubs for racism were Leeds, Chelsea, West Ham and Milwall. The Spurs fans were obnoxious in other ways but not Right Wing. That's my experience of growing up in South Manchester anyway.