People can make-believe of anything: an idea; a time/place; a person; the worth of Brexit. It might be founded on sheer strength of feeling or on the perception that a logical position is providing a complete picture. Checks on reasoning are subsumed into the comfort of confirmation bias. It becomes a feedback-loop of superiority and victimhood, working as a shield against all opposition.
The greater the investment in a position, the greater the requirement for its justification and, the more one justifies an investment, the more one becomes consumed by the need to. This is an ideological dependency developing a religious-like zeal for its own protection. Seeing is believing where believing is seeing: these are now the same thing. Chicken and egg. It doesn’t lead to truths, except by virtue of coincidental overlap – luck – or by lessons learned through the observation of its example – judgement.
And because the cold, hard truths of Brexit are self-evident, either you admit your error, to yourself, at the very least, or you double down and brazen it out, in the hope that denial will buy time and yet save your face. Thus, through fear or cynicism, you set yourself to the mission of converting and recruiting others because, well, safety and righteous correctness in evangelical numbers, right?