BTW I don't disagree with the people who don't want everyone be welcome, I just think that their solution ideas and demands are misguided. My observation is that people from various ethnicities can function in cohesion and are about the same when they are from a similar educational background and rarely have ethnical or racial issues among themselves and IMHO all the problems will be resolved if you let people naturally find their appropriate group they belong to instead of having BS like country borders and visas and DEI or race based positive discrimination etc.
The worries people have, especially in somewhere like Britain, is it's a country with a relatively small population compared to the level of immigration, and housing is an enormous problem. One outcome that I think can be to a considerable extent[0] attributed to high net immigration is that housing has become smaller (many houses divided into flats), and housing has become much more expensive. So anyone who already owned a house is sitting fairly pretty, as they get bouyed up by the housing market, but anyone looking to buy for the first time, or buy into a new market for the first time (e.g. moving to near schools for kids) is going to have a massive problem, as the competitive pressure has up-bidded housing and made it worthwhile to subdivide and sell/rent smaller dwellings.
This could be all white people doing it (somewhere like Cornwall in the UK is mostly annoyed because other Brits buy holiday homes there, driving up prices for locals and their kids who are coming up) - it doesn't matter. The housing costs are what matter. And they, a bit like fuel, drive up everything else: NHS workers need higher salaries to just be able to live in many places, which drives up taxes.
This isn't to avoid actual race/ethnicity-related tensions. But there's a giant clump of people who are just fed up with their money going far less far than their parents' and grandparents' money did when it comes to one of the fundamentals of life: housing yourself and your family. And their parents and grandparents are equally upset that their kids/grandkids have in a major sense a harder life than they did.
[0] definitely not fully; there are multiple factors. But if you net import the equivalent of the population of Liverpool each year, and you aren't building a Liverpool each your to house them, it's obvious that prices will start shooting up.