From the article:
Hitler wrapped his party's death wish in the epic operas of Wagner inspired by the medieval German Nibelung saga of Teutonic gods, funeral pyres, Valkyries, and the fiery destruction of Valhalla, the great Norse hall of deceased nationalist heroes. Sinbad, the Arabian Knights, and the Rubaiyat of Omar Khayyam similarly populate Arab lore with outsized warriors and god-defying mortals who seek glory through death over defeat through submission.