I've heard this is indeed often the case, emigrants embracing their home culture in a more fundamental way. Maybe the imagined state of one's culture is often that of the grandparents' time, always a bit behind of the reality.
The most ridiculous subset are those people who live in Spain and complain about "immigrants" in Daily Mail comments. They may be in for a surprise if the hard Brexit they supported happens and they lose their right to reside in Spain because the UK won't guarantee residence for Spanish nationals.
(+) Not All Expats
The problem is that a big majority of them does not speak the language and, in case of creation of a points visa like some Brexiteers want for migrants coming to the UK, they will fail due to their lack of integration.
Not just that of the grandparents' time, but an idealised/extremised version of it, blurry and pastel, filtered through the lenses and expectations of those who actually lived it.