Look deeper: the sensationalist tabloids run this line of propaganda because they're owned by right-wing billionaires (or near-billionaires) like Rupert Murdoch, Conrad Black (before his fall), and Andrew Desmond. There's a vulgar bigoted Atlanticist strain to this ideology that likes to imagine it's following in the tradition of Winston Churchill but in reality is in hock to the same malign influences as the US Republican Party.[*] But anyway: the great deregulation that's swept the USA since Reagan's election in 1980 is something that they'd love to implement in other markets, and by hiving the UK off from the rather more strongly regulated EU they can give themselves a happy capitalist playground.

I'm going to leave your last sentence standing because it sums it all up: a cabal of racisms, xenophobes, imperialists and the worst kind of selfish capitalists.

[*] Churchill at least had a non-hypocritical reason for being an Americanophile: his maternal family.