Thirty-three miles into the Arctic Circle, in the village of Kotzebue, Alaska, where more than 70 percent of the people are Eskimo, the local elementary school had guests one day: two Chabad shluchim (emissaries) from Anchorage, some 550 miles away. The children showed them Eskimo dances from the Inupiat tribe. The shluchim danced chasidic dances. Rabbi Avraham Berkowitz asked, “Did any of you ever meet a Jew?” One girl raised her hand, yes, and she pointed to her mother, the fifth grade teacher. The mother had intermarried with a native man. The mother asked if the visitors could tell something...