Are working class guys racist?Watch
Are they more likely to date women from their own cultures?
The 'upper classes' also have their funny worldviews.
If working classes tend to have problems with other races and immigrants, its usually because they often compete for the same jobs in the labour market.
However being moderately socially conservative =/= racism.
Anyone can be racist. Racism transcends income group and political alignment.
Most TSR users are, however, anon-abuser-ist.
As far as dating from "ones own culture", that is pretty close minded at least if not outright xenophobic and again, often implicitly racist. I don't think this is necessarily common though.
Personally I prefer South Asian and black/mixed race women to white women, but I'm not incredibly fussed.
The men that are more likely to be racist are unemployed and live in all-white areas surrounded by drugs and crime. Perhaps associate themselves with far-right groups like the EDL. These are the men you should be careful of.