Together with his wife and children, shortly after the Fall of Fascism and Mussolini's government during World War II, he was killed near the Swiss border by SS troops in 1943.

After the war, the city of Turin was affected by the turmoil of the Biennio Rosso (Two Red Years) with repeated strikes, lockouts and violent demonstrations.

He participated in the March on Rome in October 1922; in 1929, he was invited to meet Benito Mussolini as a part of a delegation of Jewish war veterans.

When Il Duce bids us farewell with a Roman salute, I feel an urge to embrace him, as a fascist, as an Italian, but I can't; and approaching him at his desk I say: 'Excellency, I would like to shake your hand'.

"[8][9] National Fascist Party's attitudes to the Jewish population, began to change when Adolf Hitler took the leadership of Germany.

In 1934, several Jews were arrested in Turin for anti-fascist activity, because of spying of a Jewish writer, nicknamed "Pitigrilli", converted to Catholicism.

He founded the newspaper La nostra bandiera (Our Flag), to remind at the Italians the Jewish people sacrifice in the WWI.

Taking a leading role in the Hebrew community in Turin, Ovazza ensured that all the key positions were held by Fascists.

"[10] After the surrender of Italy to Anglo-Americans, in 1943, Ovazza moved to Valle d'Aosta, with the hope to cross the Swiss Border, but in an attempt to do so, he was captured by SS, and murdered, along with the rest of his family, except the daughter Carla, who had found shelter in Paris, France.