@evan Yep, when I lived in London but had traveled to New Zealand to visit my family the passport control officer questioned me about my trip.
Where have you been? Are the people nice there? Well why didn't you stay there?
It was cruel to me, as a white person of British descent, fully documented and trying to make a life for myself in London. I can only imagine how much worse it was for other people who were the specific, racist, targets, as part of the 'hostile environment' policy.