M
You may come to enjoy doing that. I started training in this kind of perceptive listening when I was in my twenties. It was required for the group therapy work a psychologist was grooming me for, but it got to be an interesting and fascinating hobby as the years went on. It can be invaluable in your workplace when you start finally catching onto the hundreds of words and "tells", as gamblers call it, that most of us display all the time without even realizing it.
I think Will is referring to unconscious bias, there is a lot of it a about and most don't notice.
For example meet two complete strangers for the first time (both the same colour if it helps).
You may take an instant liking to one person and an instant dislike to the other before they
even say much more than hello.
Then there is deliberate out there racism.
Both are as bad, at least you know where you stand with the up front racism.
The unconscious bias though needs addressing too, mostly it is harmless, but if leads to discrimination,
bad actions, downright nastiness then it needs to be dealt with just as much as the outright
racism.
I just wonder what these people would have made of Jesus it is doubtful he would have been white!