In 1948, Tixier-Vignancour became the lawyer of French novelist Louis-Ferdinand Céline, accused of "collaboration with the enemy" for his antisemitic and pro-occupation writings. He obtained Céline's amnesty on 26 April 1951, after he presented his client under his real name, Louis-Ferdinand Destouches, with no judge able to draw a relationship between Destouches and his pen name, Céline. While waiting for his electoral ban period to end, Tixier-Vignancou joined the neo-fascist party Jeune Nation soon after its creation in 1949. He helped Maurice Bardèche establish the magazine "Défense de l'Occident" (an important arena for the discussion of right-wing ideas and Holocaust denial text) and the neo-fascist coalition European Social Movement in 1951-52.