A genre thriller with personality to spare, “The Wolf of Snow Hollow” is the rare horror offering that provides more character than carnage. Buttressed by a cast that deserves their own long-form series, the film by writer/director Jim Cummings isn’t content to just serve up a T&A gore smorgasbord, probing instead at ideas related to toxic masculinity, police reform, substance abuse, and parenting in the age of FaceTime.