Many Mennonites, at least those watching movies in the 1980s, likely remember the stir caused by Witness, the 1985 film set among the Lancaster, Pa., Amish community. Rather than joining the debate about whether the movie transcends the standard pattern of action flicks, my mind after all these years remains fixated on a small encounter between an obnoxious tourist and Harrison Ford, who is posing as an Amish man …