These are people I talk to one on one about all kinds of different issues - mostly philisophocal, rarely political - and they all had a few small things in common with the EU debate:
* a certainty that the UK is dying. There is less and less value here, and continuing with the current setup spells for a long slow death.
* an outright distrust of the political class and the media class. Most can cite cases where they have been outright knowingly lied to in ways most wouldn't realise.
* a feeling of betrayal by those screaming remain and insulting anyone who disagrees. These are people who were often close friends who just weren't the kind to get into the discussions we enjoyed.
So the obvious thing for these people to do? Vote leave. We can start the fight now and possibly survive, or delay it and definitely die. Why didn't they talk about it? They did. Just in places where there is no audience, only participants.