Robert Oppenheimer quoted a piece of Hindu scripture when he said, "Now I am become Death, the destroyer of worlds." Why did Oppenheimer say this? Responses He participated in the invasion on D-Day. He participated in the invasion on D-Day. He witnessed the atrocities of the Holocaust. He witnessed the atrocities of the Holocaust. He had listened to America's declaration of war. He had listened to America's declaration of war. He watched the detonation of the atomic bomb.