Next door neighbor raised a Dobi from when she was a young pup.
With no know negative encounters, that dog would go nuts when Asians walked by. (which was only occasionally)
But it was consistent and focused only at Asians.
Predominantly white neighborhood, some Hispanics.
“Next door neighbor raised a Dobi”
A whut?
I suspect that some dogs don’t like the food smells that are characteristic of some groups. Asian spices, Mexican chili spices, etc. might set off a dog.
My son’s K9, with a very sensitive nose, barks at some dogs (waging a tail sometimes, putting on a napkin at other times), while not barking at others.
However, my daughter’s late mixed Cocker Spaniel/collie, etc once growled so fiercely at a drunk Hispanic who stopped walking in front of my house and looked at my granddaughter in a very threatening way.
The dog, Chico, nearly pulled me off my feet, but I was able to restrain him from attacking this guy, while telling my granddaughter to get inside and also yelling to my cop son, get your badge and gun.
The drunk finally staggered down the street to a private home, but we still had the police pay him a visit, esp. after hearing he “eyed” my granddaughter.
A couple months later, he “totalled” a new Mercedes by hitting another parked car a few houses down. We never saw him again, after his jail stay.
Sometimes dogs sense something is wrong with a person long before humans can, which is why they are called K9’s, and not Feefie.