The question was, "what have Blacks gotten by rioting?"
Consider this. The police officers involved in the Rodney King case were acquitted by a jury. However, despite their Constitutional protection from double jeopardy, after Blacks rioted in L.A., the Feds gave them what they wanted. The officers were re-tried in a kangaroo court and sentenced to 30 months.
Rodney King led police on a high speed chase. When finally stopped, he attacked the police. They attempted to tase him, more than one time. However, he kept getting back up and attacking them. That in and of itself is terrifying; the man seemed "super human." Remember, the police get tased themselves as part of their training. So, they know this guy is really out of his mind, extremely strong and he keeps attacking them. They assume he is on PCP, which seems a reasonable assumption, given his behavior. However, the police do not kill him, which given his behavior, seemed long-suffering. Still, they did beat him, but Rodney King was unable to be restrained with standard tactics. Was his beating too severe? It looks that way on video tape. In a situation like that, the police are trained to intimidate the person into submission. So, they are supposed to surround him in a huddle formation. Rodney King's injuries were not that severe. His cheekbone healed within a weak and his broken leg was just a hairline fracture. Considering his behavior and the threat he might have posed to officers who had their own lives and welfare to consider, his injuries seem insignificant. So, why should the case be re-tried by The Federal Government? Nothing in it warrants that kind of attention. However, they got it! And they got it because Blacks rioted.