Those one degree of separation from Anne Frank have made their way into headlines in recent weeks: Dutch Jewish notary Arnold van den Bergh, who allegedly betrayed the Frank family by reporting their whereabouts to Nazis officials, a potential foe; and Hannah Goslar — a friend — Holocaust survivor and schoolmate of Frank’s in Amsterdam, whose story is most recently depicted in the film “My Best Friend Anne Frank,” now streaming on Netflix. “My Best Friend Anne Frank,” directed by Ben Sombogaart, oscillates between scenes of Hannah (Josephine Arendsen) navigating the beginnings of Nazi rule in Amsterdam in tandem with...