Riots. Lots and lots of riots. Many of my friends would hate the justice system more than they do now
Here's the problem. The black community was screwed over a lot in the 90s by the police. Rodney King's beating and the police being let off was a gross injustice, and police had been doing that sort of thing a lot. So the feeling was that the police were just out to abuse black people, and the justice system was just looking to go after black people. Given all the stuff that went before, those feelings are understandable.
The problem is they were projected onto the OJ Simpson case and projected onto it hard, but they were not logical to the case. OJ killed those people. I may have to defend that, but I shouldn't have to given the evidence against him, people saying he told them things like "I have a dark side you don't know" and "If she hadn't come to the door with that knife, she'd still be alive", and the fact that he never even tried to "find the real killer". OJ did it. The problem was, because of the things that had happened in the early 90s and because of the overall police abuse that had been going on for decades, the black community assumed it was white police going after OJ Simpson as a black man.
The black community will riot, and there may be lingering feelings as you said, and I think it would be tragic if there were. Those times made the black community think not of the content of character, whether of the person or the events, but of the skin color; that the person was only being put through this because they were black. And the white officers had been thinking of skin color in years previous, abusing the black community because of suspicion that if you were black you were more likely to be involved in something violent or criminal than a white person, which is what led the black community to that the aforementioned view. It poisoned, and will further complicate in a poisonous way the whole issue of race relations and the discussion of race and race relations in America. It did quite a lot in the OTL, since the white community thought that black people only supported OJ because he was black, and were furious that he had been found innocent.