Harold Davis wrote

Many British expats don't distinguish much between their
revulsion towards black, brown and non-English speaking
immigrants to Britain and the revulsion they also feel towards
the "native" proletarians who are white and English-speaking.

Revulsion is too strong. Dislike or the opposite of preference is much
closer.

To think many of these types had a vote in the referendum...

That’s what democracy is about, they get their say, just like everyone else.