 In August 1938 Menghin went back to the University of Vienna.He was friends with Adolf Mahr

In Catholic circles he was considered a traitor from March 1938 onwards, and was discharged (excluded) from his Cartellverband (Catholic Union-group), the Rudolfina Wien (which like all Catholic unions had been banned), at a formal underground meeting held on 12 November 1938.After the War he was included, as a member of the Seyß-Inquart regime, on the primary list of war criminals.