How do you teach an Amazon tribe, who has no idea what a movie is to act like angry savage cannibals? Eli Roth’s solution: Make them watch Cannibal Holocaust. From director Eli Roth, the horror mastermind behind some of the scariest movies of all time such as Cabin Fever and the blockbuster Hostel franchise, comes GREEN INFERNO, a terrifying new film about a group of college students who take their humanitarian protest to the Amazon jungle, only to be taken prisoner by the indigenous tribe they came to save. Filmed entirely on location in Chile, the Peruvian Amazon and New York City, Green Inferno is Roth’s first feature film in six years and is the third installment of the horror-auteur’s “travel trilogy.” In the horror genre, says Roth, “the scare is the star.” Rather than A-list names, a horror film requires “good actors, a good script and a director who…