I think a lot of the topics discussed in the spiked online article miss the point. A very tiny proportion of any population is violent so looking at racial attacks tells you little about racism in the wider community. The same can be said of the proportion of criminals of different ethnicity. While whether there is bias in the criminal justice system is a topic for serious debate it is still only looking at a small number of people. It is important to that small number but doesn't shed light on the wider issue. Also asking people's opinions can be very misleading. People generally have learned over many years what is regarded as socially acceptable and what is not so you will tend to get responses that fit the social norm even when that isn't their real view. It is noticeable that the article uses the Afro-Caribbean community to discus mixed marriages. Mixed marriages have never been a taboo in the Caribbean. The first black people I became friends with were a couple from Jamaica. He had a white father and a black mother. His wife was part white, part black and part Chinese.
A better indicator of how widespread racism is in the community is a measure of the barriers people from a BAME background face in everyday life. Since the first Race Relations Act was passed in 1965 there have been countless studies of how ethnicity affects employment opportunity. A typical method used is to send identical CVs but with different names. A recent study by Oxford University found that people who stated that they were born in the UK or came here at a very young age, but were from the BAME community, had to send far more applications before getting invited for interview. What's more they compared the results with a similar study carried out in 1969 and found that there was little or no change in the results over a 50 year period. There are some of the details in this Guardian article
. The level of discrimination is not uniform across different ethnic groups within the BAME community.
The couple I mentioned earlier had no real Jamaican accent, in fact the wife's was more American, since she had worked for a time as a librarian in New York. In 1967 they had just come to the UK and were living in temporary accommodation provided by the University but were looking for a flat to rent. Everyday the wife would go out and buy the local evening paper, which came out about noon, look for adverts for flats to rent and phone any that looked promising to make an appointment to view that evening. When they went to the appointment, in virtually every case, the person would answer the door, stop and stare at them and then say sorry but someone had just rented the apartment so it was no longer vacant. She would then check over the following days and see that it was still being advertised. In the article linked above the Guardian reports that the same is happening today.
The racism of apartheid has gone and other extreme forms of racism are certainly at a much lower level than they were back in the mid 20th century but widespread discrimination lives on largely unnoticed except by those who suffer from it.