This is a subject, like Victorian working conditions, that people get really bothered about, but the reality is that their views will become so anachronistic - and so quickly - as to render them pointless.
Think about this country sixty years ago. Most people had never tasted foreign food, nor had experienced any meaningful contact with folk from a discernibly different racial profile. That's no longer the case to an almost bewildering extent.
Why is that? Communications, technology, transport, exchange of ideas. The world we live in is much, much smaller, more attainable and more interesting place than sixty years ago.
People focus too much on how our country has changed. It hasn't, so much as the world it exists in has utterly changed. Irrevocably.
That is the challenge that Farage and his ilk cannot meet. The tide of human history.
I posted an illustration of Kung Canute earlier in this thread for a particular reason.
None of us can stop what's coming.
To suggest otherwise is insane.