About 15 years ago, an Israeli university student in her early 20s was walking home from a Holocaust Remembrance Day ceremony she attended at her mother’s insistence. “When I was growing up I tried to run away from anything connected to the Holocaust, ” recalled Adi Altschuler. “But as we walked along Rothschild Boulevard in Tel Aviv, hearing televisions blaring a EuroLeague basketball game that young people were watching, two thoughts hit me at once: Soon there would be no survivors left to tell their stories — and there had to be a better way to spend the evening.” Altschuler...