How you guys know who started it? After all, at the beginning, the black guy says, "AC Transit" and nothing more, and the white dude did ask him, the guy that got rocked, if he would spit shine his shoes. If someone asks me that, I'd be pissed too.
I was thinking the same thing, but then I thought that would be stupid because why would they put themselves through all that just to turn on each other.