Referendum votes were the proximate cause, sure, but isn't that kind of like blaming the metal atoms in a bullet for the death of a shooting victim? You're not wrong, but focusing entirely on "the voters" is willfully ignoring the bigger picture in ways that just might be important.

The metal atoms do not have free will, and they cannot obtain, integrate or act on information.

I am lucky enough to live in a country where I have the opportunity and freedom to vote as I see fit. And because of that, me, and no one else, is responsible for how I vote.

With great power comes great responsibility.

Free will doesn't imply immunity to being influenced and/or predicted.