[Unassuaged]

“black peoples dogs bark at white people.”
—mostly true, I believe.
But:
On a few occasions, I have calmly interacted with a leashed dog with an owner that seemed to wish his dog would bark at me (or was dissapointed that it didn’t). Seemed to piss them off that their dog seemed to like this white guy!

[Ditter]

I have found it to be absolutely true. Also, if the man of the house wears a beard, the dog is OK with bearded men. If he doesn’t wear a beard the dog will bark at a man who does. Same with hats. The dog tolerates hats if he is accustomed to seeing his people wearing hats. Of course you have a few laid back dogs that don’t care and some are OK with armed home invaders if they brings snacks.