What happened after the announcement ?

During Mr. Ross' speech, the televisions begin to play a comp film from a concentration camp. “There is your leader!” (134) he says, pointing to an image of Adolf Hitler. He lectures the students, explaining that they would have been “good Nazis” (135) and they must never prioritize the will of the group over their own freedom. The students are stunned and ashamed of themselves, and they slink guiltily out of the gym.