Kind of harsh surely - many were misled, no ?
It always struck me that the British, unlike the Irish, were reluctant Europeans. They'd fallen a long way from splendid isolation, "fog in the Channel, continent cut off" days, but they couldn't forget the glories of Empire, even after the humiliation of Suez. When Rudyard Kipling first set off for India, he was told, "remember, after all, Sir, you are an Englishman, and have therefore won first prize in the lottery of life". This sort of thinking lingered on, and the Brexiteers sold it very successfully, that Britain, unencumbered by the strange rules and habits of foreign Johnnies, would soar once again to the forefront.
People accepted this, because they wanted to accept this. They wanted to be seen as exceptional, the way the Americans think of themselves, of punching above their weight. I still can't get my head around that this little country off the shores of continental Europe, in an age of anti-ship killer missiles, ordered the two biggest and most expensive ships ever built for the Royal Navy. Perhaps only another Suez will bring a dose of reality.