To paraphrase a soundbite from The Gospels,
'It is not what goes into a country that makes it unclean
but what comes out of that country'*.
What goes into a country is the mix of people,
money, food, drugs, and other vices and services.
What comes out of a country is the discussion
the nation has when it calls itself a democracy
and demands it's citizens take part in a popular vote
'to settle matters X, Y and Z once, and for all.'.
In the UK it is always 'for all'; we decide by simple majority.
And it seems said majority are simple enough in themselves
to be unable to appreciate the power of the bile and hatred
which when properly articulated destroy all reason.
*Mathew Ch 15 Verse 11 -
'A man is not defiled by what enters his mouth, but by what comes out of it.'