Christine Niles, a Vietnamese immigrant who helps run a parachurch organization in Michigan that promotes Roman Catholic teaching, expected to spend this week preparing theological materials and getting ready for the group’s annual conference for men. Instead, Niles, who is editor-in-chief of Church Militant, has been in consultations with local law enforcement after learning that a left-wing group is drumming up support to shut down the conference, which will take place on Aug. 4-6 at locations in Ferndale and Sterling Heights, Mich.