This week comes Civil War, a movie about a second American civil war taking place in the near present. We are four years removed from an attempted coup by a mob of traitorous right-wingers and seven months before another election that has many people predicting yet more violence whatever the result might be. (Oh, and some people are still fighting over the meaning of the first Civil War — looking at you, Nikki Haley.) So this movie must be an im…