Hi there!
The claim is basically your argument. Your opinion on the topic.
The last description makes the most sense, as to how the wording "mob" and "populace" imply them as behaving as group. Called social group psychology, many people "join the crowd" when it comes to supporting or opposing certain events, causes, or acts.
Flashback is a dominant feature in the movie version of Steinbeck's Of Mice and Men. The use of flashback opens the 1992 film. The image of the woman running in a red dress through a field, and then of the lynch mob that wants to capture George and Lennie influences the viewer.