Although the Popular League proved to be short-lived, Oehler continued to publish SM as an outlet for his political ideas until, in 1932, he joined the New Front.
After the split he joined with Rolf Henne in forming the hardline Nazi Bund Treuer Eidgenossen Nationalsozialistischer Weltanschauung [de], another minor group which was absorbed by the National Movement of Switzerland in 1940.
Having attended a meeting in Munich in 1940 organised to bring together pro-Nazi Swiss leaders, Oehler was tried for treason by a federal court in 1947 and sentenced to two years in prison.
Upon his release Oehler became a leading member of the Volkspartei der Schweiz and headed up the Swiss branch of Nation Europa, an international neo-Nazi journal.
He also adopted the pseudonym Hans Rudolf to translate works into German, notably Nuremberg ou la Terre Promise of Maurice Bardèche, as well as writing for the far right journal Turmwart.