The British writer, activist, and rapper Riz Ahmed has had a very public life since leaving drama school to star in “The Road to Guantánamo.” He won an Emmy for playing the lead in “The Night Of,” appeared in the Star Wars film “Rogue One,” and played Hannah Horvath’s baby daddy on “Girls.” He has continued his music career as Riz MC and was featured on the song “Immigrants (We Get the Job Done)” from “The Hamilton Mixtape.” Riz has been an outspoken activist for immigrants in the U.S. and Britain, and, at this year’s New Yorker Festival, he spoke to Alexis Okeowo about how his past has shaped who he is and steered his career choices. Ahmed’s work is often political, but he resents the category of political art, which he sees as a way to marginalize viewpoints that the mainstream views with suspicion.