I guess the liberty group perhaps looked at others personal experience. My own is that I've seen far more discrimination in Spain than in the UK.
There was an interesting study I read the other day, showing what some in here claimed was valid. It related to the apparent rise in reported racist incidents after Brexit, which seemingly hasn't lead to an increase in convictions, which was what some contended.
Apparently some claims of racist incidents were nothing of the sort, one example given was shop windows broken, which turned out to be part of a spate of smash and grabs.