The footage of the "JBU terrorist attack" was actually news reel footage from when a B-25 bomber accidentally crashed into the Empire State Building.
The "viewer discretion advised" title card was suggested by a woman in the film's test audience.
The "paddy rollers" mentioned several times, including the theme song from the Cops - Verbrecher im Visier (1989) parody, is slang for the vigilante slave patrols that hunted down escaped slaves before the Civil War, and were a model for the Ku Klux Klan.
The reason San Francisco was chosen as the place the audience watches the "documentary" was because the filmmakers wanted the irony of portraying a traditionally ultra-liberal city in the ultra-conservative Confederacy.
Aunt Jemima, cited during the epilogue as a brand name rooted in slavery, would not be discontinued until 2020.