No club can be racist. Unfortunately the NF infiltrated all sorts of football clubs. Some were more resistant than others. Birmingham was infiltrated but has one of the most cosmopolitan fanbases. There are just as many that stopped going to Chelsea due to be NF and hooliganism but those were times when racism was deemed not only publically acceptable but the norm. Thankfully those days are behind us now
I do know for a fact that Stamford Bridge was the only football ground where, in the 80's, they were guaranteed to sell 100's of papers each match day. I couldn't see that happening now though.