African Americans were not the only group lynched in the US. In the 1890s, there were six lynchings of Italians, three of them in Louisiana. This is the story of one such lynching in New Orleans.
After the emancipation in 1865, the power in New Orleans imported Sicilians to replace the African American. After a time, they came to regret this decision, as the Italian population grew to about 30,000 by 1890. They, particularly James Huston (Christopher Walken), set about trying to play the two factions of Sicilians (the Machecas and the Provenzanos) against each other.
It should be noted that politically correct terminology is not used for the two races.
Since the Sheriff (Andrew Connolly) wouldn't go along with the Mayor (Kenneth Welsh) and the other leaders, he was disposed of. Another policeman (Luke Askew) reported that "dagos" did it and riots ensued. Six men were pointed out by a "witness" that was intimidated by the police.
A "trial" was held, but the results weren't what the town expected, so they took matters into their own hands, stirred up by the Mayor with threats by Huston that it will be done "with you or without you." Of course, many more were murdered in the real event that took place, but this is a movie.
Huston got what he wanted.