Nothing new in the attitude of border guards
I lived in the USA for over 20 years (and paid plenty in taxes as an engineer). I came back to the UK some 15 years ago.
I distinctly remember returning with my then other half and young son from a visit back to Blighty to see the family in the early 1990s. The other half and son got a warm 'welcome home'; I got a look that should be reserved for looking at a dog mess on the street.
That attitude is not common among the companies and people I worked with (who valued my abilities and knowledge) but it is, unfortunately, very common in the border agencies and has been for decades.