In fact every culture I know (directly or am informed about) is different form the others. I wrote a blog post about this: https://pietersz.co.uk/2023/08/racism-culture-different
I do not think people in the UK care about where immigrants are from, they care about whether they compete with them for jobs. This is why some groups of people wanted less EU immigration (predominantly unskilled) and more skilled immigration, and professional people almost universally want EU immigration and oppose post Brexit policies that have allowed more highly skilled immigration.
And it's impossible to import these people anymore, because a) the wages in the UK are low - lower than in most of the EU and much lower than in the US, and b) many of these professions are not really classified as high skill, even if they take a lot of practice.