Thing is I suspect when people are talking about immigration these days they’re mostly talking about asylum seekers because it’s been so topical and we now use the term “illegal immigrants” for them - even though they make up a very tiny number and calling them illegal immigrants is questionable at bestExcept it's been shown time and time again that the areas with least immigration were more likely to vote for Brexit (and less immigrants) than the areas with the highest level of immigration - most of whom voted remain.
Nigel himself is standing in an area with very low levels of immigrants and minorities.
Why are people who are least likely to regularly come across people from other countries and races so much more anti-immigration? Could it be that it's much easier to convince people that immigrants are The Worst when they haven't really had the opportunity to meet any and discover that the vast majority of them are just, you know, normal bleeping people.
Then you also have the group that are likely referring to anyone who isn’t white or fits into their idea of white. I suspect the whole conversation centred around “slurs” used against white people (which someone here implied at one point) is probably targeted against some of these groups of people. I’ve never personally faced that and I suspect most people haven’t but I have heard anecdotes from a friend that in private they use these words and there’s probably some use of them on social media and we all know that’s really reflective of the real world (being sarcastic here for anyone in doubt)
The second point also goes into the first point because ultimately a lot of asylum seekers aren’t white