The riot isn't seen in the movie, but it is alluded to. He has this one speech that gives a great sense of texture and paints a picture of what was happening in Harlem then.
“Finland, and all the other European countries, we are too dependent on imported energy. We should be using a broader variety of energy resources.”
“A half truth, like half a brick, is always more forcible as an argument than a whole one. It carries better.”