My experience is very different. I know Black people who are very active in rescue, breeding and showing; and numerous Black veterinarians and vet techs.
You can even see them petting the kitten in parts of the film I’ve seen... what I saw looked like they were just tossing the kitten a few feet and having it swim back to them... Not something I would do, but I really (and I admit I couldn’t find the entire full video) didn’t come across as a major incident of “abuse”.
They weren’t throwing it 500 feet in the air, and they weren’t throwing it like a rag doll or “frisbee”... gently tossed it a few feet into water and it would swim..
No, not something I would likely be doing, but abuse? I don’t know about that... I hope there is way more video than I found... I am sure the kitten didn’t like it, but cats generally don’t like water at all so.