Earlier quoted context omitted.
To be honest, my experience is that US border checks are very aggressive (like, passive aggression and suspicion is the default attitude). I've seen worse, but my last entrance into the US (in 2012) featured barking sniffer dogs and open distrust – and I'm a white middle class European traveling from a European country. Don't get this much in other places.
Every time I have flown to the US the border/passport guards have been polite and friendly. I'm a white, 40+ Brit with family. YMMV.
But it's been friendly with bags searched nearly every damn time, and the clear implication that I am a threat.
I am a white middle class male with nothing against the US (and indeed a long time working for a US flagship company), but I am clearly unwelcome.
So I simply don't attempt to go any more.