The Brexit vote wasn't mere xenophobia, it was self-destructive lashing out by people whom the political classes had written off for a generation.
The lie of "evidence-based policy" and the accrual of the benefits of globalism to an ever-dwindling elite has created a situation where many people see no difference between doing nothing and burning everything to the ground.
It's a powerful lesson for the US Democratic Party, who have taken the same people for granted, and who are in danger of having their lunches eaten by a racist Oompa Loompa who's just banqueted on the GOP.
One of the most insightful things I saw in the run-up to the referendum was this video produced by openDemocracy's Adam Ramsey and Anthony Barnett discussing their visit to Doncaster, another Labour heartland. They chose Doncaster because it looked set to be a strong pro-Leave location, and wanted to understand what was at work in this. Crucially, they observed that – in strong contrast to the Scottish 'Yes' movement – Brexit was not fuelled by hope for a different future. On the contrary, many Leavers believed that withdrawing from the EU wouldn't really change things one way or the other, but they still wanted to do it. I've long suspected that, on some unconscious level, things could be even stranger than this: the self-harm inflicted by Brexit could potentially be part of its appeal. It is now being reported that many Leave voters are aghast at what they've done, as if they never really intended for their actions to yield results.
This taps into a much broader cultural and political malaise, that also appears to be driving the rise of Donald Trump in the US. Amongst people who have utterly given up on the future, political movements don't need to promise any desirable and realistic change. If anything, they are more comforting and trustworthy if predicated on the notion that the future is beyond rescue, for that chimes more closely with people's private experiences. The discovery of the 'Deaton effect' in the US (unexpected rising mortality rates amongst white working classes) is linked to rising alcohol and opiate abuse and to rising suicide rates. It has also been shown to correlate closely to geographic areas with the greatest support for Trump. I don't know of any direct equivalent to this in the UK, but it seems clear that – beyond the rhetoric of 'Great Britain' and 'democracy' – Brexit was never really articulated as a viable policy, and only ever as a destructive urge, which some no doubt now feel guilty for giving way to.
Thoughts on the sociology of Brexit [Will Davies/Political Economy Research Centre]