From what I can tell, it's not so much a lack of intelligence that was doing the work here, but a lack of information, exacerbated by blatant lies told by the Leave campaign. It'd be nice if citizens could see through those lies, and certainly racism, xenophobia, and economic anxiety contributed to some wishful thinking and lashing out at the wrong set of elites, but it's not reasonable to expect everyone who votes to be able to cut through the BS when so many politicians are so good at manufacturing it.

I'm still holding out hope that this hits some procedural / constitutional snag that keeps this from happening. Not that the EU doesn't have its problems, of course, but I think I'd take those over the problems that leaving is likely to create.