In his 2002 book The Real Odessa[1] Uki Goñi showed that Argentine diplomats and intelligence officers had, on Perón's instructions, vigorously encouraged Nazi and Fascist war criminals to make their home in Argentina.

Over the spring of 1946 a number of French war criminals, fascists and Vichy officials made it from Italy to Argentina in the same way: they were issued passports by the Rome ICRC office; these were then stamped with Argentine tourist visas (the need for health certificates and return tickets was waived on Caggiano's recommendation).

In 1961, Caggiano wrote a prologue for the Spanish translation by Juan Francisco Guevara (who later became a colonel) of Le Marxisme-léninisme, written by Jean Ousset, private secretary of monarchist intellectual Charles Maurras, and founder of the Cité catholique fundamentalist organization.

According to Horacio Verbitsky, an Argentine-Jewish member of the far-left Montoneros paramilitary, who does not say that it was expounded in the book, this concept "conceived a protean, quintessential enemy who, rather than being defined by his actions, was seen as a force trying to subvert Christian order, natural law or the Creator's plan.

[6] In this prologue, Caggiano explained that Marxism is born of "the negation of Christ and his Church put into practice by the Revolution" and spoke of a Marxist conspiracy to take over the world, for which it was necessary to "prepare for the decisive battle," although the enemy had not yet "taken up arms."

On this basis, Verbitsky, a member of the far-left Montoneros paramilitary, attributed to Caggiano support for "human rights violations", commenting: "As often happens in a continent that imports ideas, the doctrine of annihilation preceded that of the revolutionary uprising.

He also says that in the course of counter-insurgency classes cadets at the Navy Mechanics School were shown the film The Battle of Algiers (1966), made by Italian communist director Gillo Pontecorvo.