Mira’s Nair new film is about the radicalization of an Americanized Pakistani, a young guy educated here, who has bought into the system, and then, after 9/11, feels thaty he’s being persecuted into someone he is not. It stars Riz Ahmed, Kiefer Stutherland, Liev Schreiber and Kate Hudson. “The Reluctant Fundamentalist” goes into limited release April 26.