“Hail Satan?” (2019). Cast: Interview Footage: Lucien Greaves, Jex Blackmore, Malcolm Jarry, Michael Wiener, Jason Rapert. Archive Footage: Megyn Kelly. Director: Penny Lane. Web site. Trailer. Advocates for causes may sometimes be surprised where their support comes from. That’s particularly true when such unexpected backing is notably vocal and passionate. So it is for the champions of several high-profile, hot-button initiatives as seen in the snicker-filled new documentary, “Hail Satan?” Those behind such issues as separation of church and state, women’s reproductive rights, and same-sex marriage often face an uphill battle, especially in light of the zealous, well-organized efforts of right-wing religious fundamentalists. The proponents of these measures can use all of the encouragement they can muster. But who would [...]