Redondo was born in Quintanilla de Abajo, Valladolid to a family of landowners. His father was Buenaventura Redondo Iglesias and his mother was Juana Ortega Pico. He studied jurisprudence at the University of Salamanca and subsequently taught Spanish at the University of Mannheim, where he became acquainted with Nazism. He worked in Valladolid for the Castilian union of sugar beet harvesters and joined the Acción Nacional during his youth. He was greatly influenced by Enrique Herrera Oria, brother of the founder of the Asociación Nacional Católica de Propagandistas and editor of El Debate, Ángel Herrera Oria. Enrique Herrera believed that communism, Freemasonry and Judaism were working to destroy religion and the Fatherland, and encouraged Redondo to read the virulent anti-Jewish tract by Léon de Poncins, Las fuerzas secretas de la Revolucion. , author of the virulent anti-Jewish and anti-Masonic tract, Las fuerzas secretas de la Revolucion— the work which introduced Redondo to The Protocols of the Elders of Zion and fed his anti-Semitism When the Second Republic was proclaimed in 1931, and after the elections of June 1931 gave a majority to the Republican-: Category:Socialism in Spain|Socialist coalition, he rejected democracy and broke from Acción Nacional. On 13 June in Valladolid he brought out the anti-Republican newspaper Libertad, where he wrote violently against Marxism, Jews, and bourgeoisCapitalism, and admired European fascisms. He founded a fascist party, Juntas Castellanas de Actuación Hispánica in August 1931 and in November it merged with Ramiro Ledesma Ramos's La Conquista del Estado to form the Juntas de Ofensiva Nacional Sindicalista. They refused to participate in elections because they believed in direct action. It was anti-democratic and imperialist and sought the "extermination of the Marxist parties". Redondo and the JHAC sought violent confrontation and recruits armed themselves for street fights with the predominantly Socialist working class of Valadolid, a city previously noted for the tranquility of its labor relations. In Redondo's rhetoric, Moors, Jews, and the Left were all merged into one: by asserting that Marxism was a Jewish invention and implied the 're-africanisation' of Spain, Redondo was identifying Spain's archetypal others, the Jew and the Moor with the Right's new enemy: the Left. The war Spain needed to fight was a new 'Reconquista', and ideologues such as Redondo's offered a 'murderous justification of violence against the left.' In 1932, he collaborated with the frustrated coup d'état of General Sanjurjo and had to flee to Portugal. He returned to Valladolid in April 1933. On 24 March 1934 JONS and Falange Española merged. He was arrested on 19 March 1936, and was moved to the prison in Ávila in June. He was freed by the Nationalists after the beginning of the Civil War. He organized the Falange's militias in Valladolid and commanded the so-called "dawn patrols" that were responsible for the murder of hundreds of suspected liberals and leftists in Valladolid. He then left for the Guadarrama mountains, where he died in combat in Labajos, Segovia on July 24. Francoist propaganda extolled him insistently as a war hero. His widow, :es:Mercedes Sanz-Bachiller|Mercedes Sanz-Bachiller, founded Auxilio de Invierno, after Auxilio Social, which was the welfare agency of Falange, further fully integrated in the Francoist State organization. , Valladolid A monument to Redondo was erected on top of, at the southern end of the municipality of Valladolid. The Monument to Onésimo Redondo was inaugurated in 1961, and demolished in compliance with the Historical Memory Law in February 2016.
Writings
Protocolos de los Sabios de Sión, Valladolid: Libertad, 1932.
Onésimo Redondo, caudillo de Castilla, Valladolid: Libertad, 1937
El Estado Nacional, Valladolid: Libertad, 1938
Obras Completas: edición cronológica, Madrid: Publicaciones Españolas, 1954-1955