You write that as if we were struggling with an entrenched instinctive predisposition, but in fact the categories of people we see as acceptable changes over time. The list of acceptables you were commenting on includes
US, Canada, Ireland, New Zealand, Australia, (white) South Africa, Scandinavia and so forth.
Ireland?!? Now there's a change. Not very long ago there was widespread hostility to Irish migration into the UK. This has now been relegated to the extremist
fringes, where I hope and expect islamophobic anti immigration sentiments will end up in the foreseeable future.