In this 2015 documentary by Italian director Roberto Minervini, poor whites in rural Louisiana manufacture and use methamphetamine, copulate, and rail against infringements on their freedom. President Obama is their mortal enemy, and they swear to protect their homes against the invasion they expect any day now. Minervini films all this in dramatic chiaroscuro, and the contrast between the verdant natural setting and the unadorned ugliness of his subjects’ sentiments couldn’t be more stark. At times, though, he goes overboard: the shot of a meth addict wandering naked down a country path would have more poetic value if it weren’t so obviously staged. Minervini has captured a segment of American society too often ignored and mocked, but sometimes he’s overtaken by the urge to romanticize decrepitude.