We complacent Remainers have to shoulder some guilt too. The question on the paper was, as everyone soon found, so vague as to be meaningless.
Nobody pointed this out, nobody said “But what about…?”. The existence of a Customs Union distinct from the Single Market will have come as a surprise to many. The question of the Irish border wasn’t raised in my hearing. The potential cost of the leaving process itself was never mentioned.
A more honest question, indeed the one that was actually answered, would have been “Do you dislike foreigners?”