Racism is universal, as Rowan infers, and difficult to control. In the BBC News, yesterday the cricket match between Australia and India (held in India) was marred because Indian spectators made remarks and monkey-like gestures at Black Australian players. Prosecutions are being talked about, but are doubtful.

Children of American soldiers and Japanese women were not and are not accepted socially in Japan.

Religion also enters into it; Belgium is a prime example and shows that long term tolerance is not enough, feelings may seem well-hidden, but Walloons and Flemings, both white, are inching towards separation. (Muslim immigrants are not acceptable to either).   

It is hard enough to control genocide-minded groups in the Congo and elsewhere and that is where attention should be focused; insults and snubs toward those perceived as different should be deplored and condemmed, but will never be wholly controlled.