I wonder if that is tied into the belief that black people actually come from some advanced ancient alien race that visited earth, not making that up.
About 35 years ago I had reason to travel to Manhattan. While walking through Grand Central, I stopped a young, well dressed black man handing out pamphlets so I took one. Seems it was supposed Islamic texts teaching that no black should own dogs, noting the teeth & the carnivorous nature of the beast.
What surprised me was finding out that at some point a disgraced son of Allah was banished to the Caucasus mountains and, finding no suitable women, mated with the local dogs, The offspring being the white race.
So, all whites were purportedly descendants of this pairing.
Never had occasion to research this so I don't know how true the allegations are that these ARE Islamic teachings