Viggo Mortensen (“Green Book”) and Chadwick Boseman (“Black Panther”) believe their films have more in common than meets the eye. Mortensen plays a racist driver in a drama set in the segregated South, while Boseman dons a vibranium suit in the Marvel tentpole as the newly crowned king of Wakanda. And yet, despite the different genres and time periods, both movies have a lot to say about the xenophobia roiling the country under Trump and the ways in which ignorance breeds intolerance.