As a caricaturist , Castelao focussed on the everyday in a humorous way , although after the cruelty and tragedy of the Spanish Civil War , he turned to using his art to denounce the misery of Fascism . As a caricaturist , RodrÃ guez Castelao focussed on the everyday in a humorous way , although after experiencing the Spanish Civil War , he turned to using his art to denounce the cruelties of Fascism in a collection of paintings .