Working class people who, especially, wanted to control immigration were called bigots, uneducated, stupid, racist, etc and were ignored. Result is that they voted for Brexit. No, that didn't change anything because this was ignored by the establishment (both Labour and Conservatives) and that is still festering with the resulting rise of the Reform UK party (of Nigel Farage who's celebrating with Trump in Mar-a-Lago right now).
Here's a better analysis of the Brexit thing which was posted here yesterday. It was mostly decided by the fact that the pro-Brexit people had better marketing campaign.
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