I doubt the black girl in the video could do any harm to that white guy (who looked like he was 6 foot and 240 pounds).
But the stupid girl was very aggressively attacking him. It could have been a Bernhard Goetz type situation, where he was just fed up with the everyday harassment.
Sometimes these type of “yutes” need to be disciplined because they think they can get away with anything. It’s too bad the hulk dude didn’t to the same to all the rest of them.
“I doubt the black girl in the video could do any harm to that white guy...)”
And if she had had a razor blade concealed in her hand? Or even if she was a karate student who could break boards with her bare hands? I’ve seen both, in such environments, even 35 years ago. (In the karate class, I had to demonstrate, by doing it, that I could block their blows, or take the blow or the fall, and split the wood myself, before I gained even a modicum of respect). We were not there; we do not know.
How big do you have to be to stab someone. She could have been carrying a knife and some of the mob probably were. Looked totally like self defense to me.