Question: The only way that the valley could be flooded by rampaging water is that a dam was broken up river. Otherwise the water rises very slowly. Does the movie explain this? If so I missed it. In which way was that river flooded?
Question: In the KKK scene, Homer Stokes says "The color guard is colored." Did he mean this literally, like Everett was a black man, or did he mean that he was white (unlikely because John Goodman is white and so is he), or is he mistaking Everett for a black man because of his dirty face?
Question: The scene when the Ku Klux Klan are assembling is very similar to the scene in "The Wizard of Oz", when the scarecrow, the tin man and the cowardly lion sneak into the witch's castle. The marching music, the disguises and the way they enter the procession are almost identical. Was this intentional?
Chosen answer: Yes, it was.
Question: What does the log mean that they carried Homer Stokes on out of the building?
Answer: Per Wikipedia: Riding the rail (also called being "run out of town on a rail") was a punishment most prevalent in the United States in the 18th and 19th centuries in which an offender was made to straddle a fence rail held on the shoulders of two or more bearers. The subject was then paraded around town or taken to the city limits and dumped by the roadside.
Answer: Probably they have dismantled the coffer dam that was used while constructing the main dam. Hence, the flooding.
Good and reasonable last resort explanation - have the Coens ever addressed it?