There seems to be more and more parallels with this vote and the Scottish one. The SNP relied on lies (oil revenues) and emotion to try and woo the voters and in the end, they failed because they could not convince the more conservative voters that their independent future was based on facts and logic rather than emotion and prejudice.
This seems to be going the same way: there is a lot of emotive stories playing the latent race/foreigner card which will convince some but until the Brexit players present convincing fact-based evidence of the benefits of leaving, I think the electorate will vote, like in Scotland, for the status quo with the hope that sensible reform will happen over time.
The EU, in the wise of Donald Rumsfeldt, is a "known known" ..
One thing is sure if the vote goes against them, the Brexits, like the SNP, will be complaining that they need a second referendum within the year