While this is undoubtedly true the ‘compartmentalisation’ is as a result of policy/law changes occurring in particular policy/legal areas whereas Brexit will precipitate top to bottom structural change in every area of the economy and society
sure, a lot of the middle classes in all quadrants of the political axes swallowed wholesale the ‘need’ for austerity and thus helped usher in the class politics that have brought us to this point - demonisation of welfare state recipients as ‘scroungers’, scapegoating of immigrants, racialising of Britishness & British values, stoking hatred of islam etc. - all of which were in the fringes of British life (to varying degrees) well before 2010 but have really thrust into the mainstream discourse since - and become concretised policy since May became Home Secretary and put the whole Hostile Environment in place.
There is a risk though in painting this divide that some political scientists group into ‘cosmopolitan’ & ‘communitarian’ elements as communitarians being default & cosmopolitans being privileged that you play into the hands of those who would limit everyone’s rights, freedom of movement, opportunities etc. It’s essentially putting your stamp of approval on a race to the bottom - of nationalism and groupthink.
There are of course a lot of ‘cosmopolitians’ that are selfish individualists and are crowing about their own personal losses (or fears of them) but I doubt they’re any larger a percentage of that group than the communitarians who think the ‘poles’/‘darkies’/‘scroungers’ are coming for their jobs/nhs. Don’t forget though that there are huge numbers of cosmopolitans fighting for universal rights, the rule of law, inclusive democracy, better climate stewardship, better pay & conditions for workers, more public ownership, better education opportunities & standards, dismantling of discriminatory structural politics, fighting to end the ‘them & us’ political narrative and so on
It’s a dangerous game sneering at those who want to fight the Government’s Flag-waving, Go Home, Hostile Environment, DUP-courting, racism-stoking, mass-deportation enacting, EU shut-off plan…even if it looks like a lot of them are weasels who only got on board the good ship to fight once they realised the personal implications