The UK has been plenty multi-ethnic since they acquired colonies. I’ll bet that there are more immigrants that incite racist sentiment from Commonwealth countries (former colonies) than from the EU.
Brexit is silly. The UK already is not a part of Schengen, and maintains its own immigration controls. They can allow and deny non-EU citizens at will. They also have their own currency and central bank.
Yet their subjects can live/work anywhere in the EU, which is an advantage for them. They have the best of both worlds now.
I think Brexit is dumb, but I don’t mind the uncertainty and chaos that is coming from the vote.
