I'm gobsmacked at your naivety and your refusal to accept that immigration was a key factor.
The Ipsos Morey surveys prior to the referendum found after just two weeks into the campaign immigration had replaced the economy as the single most important factor driving the leave vote. This was confirmed by other surveys. Do you still need more proof?
How about the relentless campaigning based around immigration - fear factor posters, australian 'points system', regaining the borders, countless interviews on the issue.
You accuse others of being out of their depth whilst missing the blindly obvious truth that immigration was central the debate - arguably the single most important issue.
There is no naivety in me at all.
Allow me to respond.
You should know, if you don't already, that surveys, as a sample of the population, are not statistically valid. If you have studied statistics, you will know that only at a certain point when the sample reaches a total of a certain %age of the total number of people available for the survey, does it become statistically valid. Hence the reason why the pundits and polls got it wrong on the 23rd. You are using an invalid premise to support your contention.
Fear factor posters on immigration - yes, by Farage. One might counter that by a fear factor approach by Osborne of a swingeing budget for all if the vote was to leave (conveniently ignored by the media, mostly)
Australian points system. Yep, the Aussies do have a points system. Do you have a problem with that?
Regaining the borders. Maybe you and others think our borders should be wide open for anyone from the EU to walk across and enter and stay in the UK. Fine. But you must also come up with the total infrastructure to support such an action. You cannot disassociate the one from the other.
There was more to the referendum that simply immigration. As I have posted before (and will not do so here), the desire to govern ourselves, and not be dictated to by Eurocrats from Brussels (immigration naturally rides on the back of this) across a whole host of issues also had a role to play. It is everything in the mix, not just the single issue of migration...