It is an inescapable fact that the racists in any given society (allowing for the fact that there is no such thing as society and it is just a figure of speech) are always without any exception from the poor white trash . Racism is almost unheard of amongst the educated middle classes, anyone educated up to university level. The anti immigrant poor are the strata that Ukip has made a very successful appeal to and thus stolen large swathes of Labour's working class voters, the old unionised Enoch Powel racists who cannot cope with economic competition and have been softened by union controlled anti competition feather bedded protected socialist jobs in the public sector.Even the tories are exploiting the racism of the decadent working classes and appealing to their xenophobia and anti economic migrant prejudice. Racism is the worst sort of tribal colectivism, it is the deep toxic poisonous well Trump is drawing on as his electoral base and it is ugly and evil and the preserve of demagogues from Marx and Stalin to Hitler on down
The idea that the racist poor working class voted Brexit because it is anti EU is fanciful as most of them would not even understand anything about the EU and the only thing they want is protectionism.Our own politicians pander to them at their peril -and ours.