It's the only place where Brexit hasn't yet been exposed to the oxygen of reality. It's the Brexiter safe space where their claims remain untested.
One theory is cognitive dissonance:
No deal is the only option left for leavers in order to minimise mental stress and the magnitude of the dissonance.
1. Discredit the figure of authority: the cult leader
2. Present contradictions (ideology versus reality): "How can he preach love when he exploits people?" is an example.
4. Self-expression: When the subject begins to open up and voice gripes against the cult...."