It was Theresa May in 2002 who highlighted the "Nasty Party" label for the Tories. Since then she became Home Secretary and the architect of the hostile environment policies of the Home Office. She has learned that embracing nastiness is the way to rise to the top of the Tory Party cesspool.
Quite a powerful article here on the Home Office, re: Windrush and other scandals (and the general erosion of standards of public administration):
https://www.theguardian.com/commentisfree/2019/apr/30/home-office-tory-policy-ruin-scandal-british-economy