Here's what I call a valid case of white-on-black racism today in the USA. In this rural LA town at a school (doesn't say elementary, middle, or high), a color line informally but severely divides the playground. One day three black guys broke the color line and sat on the white side, under a tree. The next day students arrived to find three nooses hanging from that tree over where the guys sat. A procession of incidents flowed from this, including the identification of the white kids who hung the nooses, and some altercations. In all cases the white kids committed worse acts, but received minor official or legal punishment, whereas in the cases where the black kids committed less severe crimes, they received maximally harsh legal charges.
Here's a case of real racism that is unambitious, and I hope this one gets national attention.