Although he was a zealous anti-Semite, Vallat was also a French patriot, and he became increasingly angry at the refusal of the Germans to reward Vichy's co-operation with a less restrictive occupation regime.
Vallat remained a supporter of Vichy's policies, however, and in June 1944, when the Allied armies had already landed in Normandy, he was appointed head of the Vichy Radio following the assassination of Philippe Henriot by the Resistance.