@PAKISTANFOREVER and everybody else. Here are some points.
1. Blacks are still discriminated against and face a tough time in society. Just because some blacks smile on TV doesn't mean being black is easy in the west. It is like saying because Shabana Mahmood and Sadiq Khan are Home office minister and London mayor there is no racism against Pakistanis. The George Floyd incident was just typical of the daily racism US blacks face and in the UK black men with nice cars are routinely stopped for no reason by cops. I can give countless examples of how blacks are treated unfairly in the UK, though of course because they are Christian and have English names e.g. Ian Wright, Marcus Rashford etc they can mix with whites more easily than Muslims or Asians.
2. Capitalism v ethno-nationalism.
a. If you deport millions of people "overnight" or even over a few years e.g. a hundred thousand a month i.e. 3,000 a day your economy suffers or could even tank. That's several million less consumers for capitalists to sell their products too.
b. If you want a high standard of living and want to be a white person who puts their elderly white parent in a care home you can't wait for 5 years for Sally and Jeremy to train up and be care workers, you need people right now, so you will accept Tundae from Nigeria or Marvin from the Philippines. Obviously you can pass laws so that they cannot settle down and live permanently in the UK, but extreme white nationalists/racists just get triggered by seeing any coloured person and they cannot tell if it's a "darkie" who has been here a few weeks or someone whose parents were born in this country, and for some they couldn't care, you are still "Brown", "Black" and a darkie to them and unwanted.
Either way capitalism means accepting immediate labour supply from the third world and accepting the retention of millions of darkies who keep the economy afloat by buying products rather than making the already weak economy go bust.
3. In the long-term things are not looking for the white ethno-nationalists/racists/fascists due to the low birth rate, break up of the family etc but they may make it such that the "darkies" who do live in the UK have to "fit in", "integrate" and give up their culture. There are divisions within the right wing. Some say they don't mind darkies as long as they assimilate, others can't stand any darkies (but they cannot provide answers for the problems mass expulsion "remigration" and lack of labour cause and seem to be living in la-la land).
As for the first type who don't mind seeing darkies per se, look at the state of "Israel". Ethnically most Israelis are middle-eastern e.g. from Iraq, Morocco, Iran but they are culturally a part of the white western world despite being tanned or dark and unofficially the pale white Ashkenazim are the elite socially, so the UK right might try to make a British version of Israel/Brazil etc.
However Britain generally is a country on the decline, a relatively small island which arguably cannot support 200 million people having the current standards of living. Current population is at 70 million approx and if it were to double and become 140 million (less than Bangladesh's almost official number of 180 million) that might not be sustainable. The county is going through a socio-economic erosion/decay/implosion and basically the white right are fundamentally saying "this is our country, not yours, you are guests, behave."
No idea what the future holds, but if people were thinking about their grandchildren I don't think the UK will be a great place to live in 30-40 years so I would advocate making plans right now to either relocate or have a 2nd home to either settle in or spend part of the year in.
