I hope it is just an age thing. Nowadays the youngsters are being raised to realise that there is a whole big world out there, accesible to them, if they wish to explore and experience it.
The populations are forever shifting and transience is the norm in most major cities.

There will always be pockets of the.." I don't like change or anything that isn't instantly recognisable to me." brigade. They are scared and prefer to be safe in their insular world, where they never have to think too hard.

They will disappear with time and be replaced by open minded people, who can celebrate being alive as opposed to being a nationality.