I was there, front and center. Reginald Denny was driving to make a delivery, and basically, there was no warning that anything like the riots were about to jump off. The verdict came in, people got mad, they shared their anger with others who were already mad ... and nobody was there to say STOP!! I don't think he could have known what he was getting into, because it was all sort of made up as it went along.
Although there were some looters who were not Black, the majority of them were. They did intentionally target non-Black establishments, but they also went after/into any kind of store that may have had something they wanted. Many black-owned businesses were spared if they had a "black-owned" sign put up in their window or door. Most of the rioters would have prefered to fight police than to steal ... but the police wouldn't show up. They had "no orders" to go in and stop the burning and the violence. So non-black store owners and a lot of firemen took the brunt of the violence.
I'm not sure what the media showed outside of L.A., but, it was definitely Black folks and they were definitely rioting! But, I'm sure what they didn't show was all the furniture and clothing and other ill-gotten goods that were returned to the stores and the establishment after people had a chance to think about it and be sorry for what they did.