I note a comment below the Murray article which quotes Suzanne Moore:
"I live in London but I leave it often enough to know that parts of the country are pretty white, enough to scare my "white" children because they are just not used to such a monoculture and find it disturbing, unreal and, to be frank, lacking.". The Guardian has been churning out this nonsense for years and now we get the backlash which means years of Tory rule.
Why do you think this is "nonsense" MsSafina?
I grew up in a very "white" part of the UK, rural and small market towns. However, the nearest big cities were within easy travelling distance and very ethnically diverse.
I moved to London in my 20's. For the usual reason of horrendous problems finding anywhere to live with rental agreements longer than 6 months, I moved around a lot in London over the next 10 years. When I first lived in areas where white faces were very few and far between, I found it a bit strange to begin with.
Then I moved to one of the least ethnically diverse cities in the UK and I found that strange and, after many years, I still do. It was not just the "visuals" but finding that local music radio was dominated by heavy rock rather than reggae - that was a big loss as far as I was concerned and very "lacking".
My mother visited me soon after I moved there and I took her around the city centre to show her the sights. After about 30 minutes she stopped dead in her tracks and said, "Well! I don't think much of this as a "City"!" When I asked her what she meant, she said, "Where are all the black people?!"
Some years ago (10? 20?) I read an article about aspects of this stereotype in the UK, ie. "Black people live in cities; Cities are where black people live; Black people are 'out of place' in the countryside." It brought me up short because I suddenly remembered when I lived for a year out of London in a small, ethnically diverse city, where I had a black boyfriend and was sharing a house with two white women and two black men.
The six of us used to go out together, usually playing tennis, and there were couple of "wind up the racists" games we used to play to amuse ourselves. The "winter game" was to go to random country pubs and stroll in chatting. Without fail, everyone would turn their backs on us and the bar staff would stride off leaving no one to serve us. The "game" was to see how many ash trays and empty glassed we could steal while chatting noisily to each other, admiring the decor, speculating on how old the building was, etc. then exiting still chatting, ashtrays and glasses stuffed in our pockets and under our coats 
The "summer game" was visiting posh, rural tennis clubs in our tennis whites to make the Club Secretaries squirm. Leaving the boys in the car, us three girls would go in carrying rackets, swishing our blonde locks and batting our eyelashes, asking if we could enrol as members and were there any courts free so we could play right then as visitors?.
Every time, we would have some slavering old git fawning over us and bringing the Visitors Book to sign us in. At which point, one of us would call go out and call to the boys that we were in luck and we could join and play, while the other two cooed their thanks and explained that we wanted to play mixed-doubles.
In walked the lads and we would just stand and watch the squirming and back-pedalling, "mistake, fully booked, not taking any new members at the moment, etc." Then we would head back to play on the Council Courts.
Having said ALL that - when I was living there I was driving through the surrounding countryside to work one day and in the middle of nowhere passed a black man waiting at a bus stop. It was such an unusual sight that my mouth fell open! 
So, I do not find the comment quoting Suzanne Moore unbelievable "nonsense" though the language is a bit "pass the smelling salts!".
I do not find it odd to suggest that people, adults or children, notice dramatic changes in their environment that are out of kilter with their expectations.
If they notice that something is "missing" then they would, by definition, perceive that as something "lacking".
Would they find it "disturbing"? They did not expect to find themselves outside their "comfort zone" so maybe they did find it unsettling?
"Unreal"? Perhaps they had had until then what amounts to a parochial upbringing, although I am pretty sure that that is not how a Guardian journalist would characterise growing up inside the M25. If true that they did find it "unreal" then it was not before time that they were taken out of their bubble to experience the diversity of "lived experience" in the UK.
Children in those "white" parts of the UK that Moore refers to might well have had more experience of visiting places in the UK with greater obvious, visual, ethnic diversity than her children had of "white" parts of the UK. In which case, they would have a better understanding of diversity within the UK than her children and be better equipped to function comfortably wherever they found themselves.
Moore's language overly dramatic language made me think of the CEO of the Lake District National Park, who is fretting that the visitor profile is not more "ethnically diverse". Maybe he should also be be putting on "therapeutic diversity" holidays for the children of white Guardian Journalists, with psychotherapists on call in case they get too disturbed and detached from reality?? 