He was also a regular contributor to the VDBL party newspaper Der Umbruch.Until 1943, the party attempted to recruit Liechtensteiners into the Waffen SS and gain public sympathy for the Nazi cause.
In 1943 the German Ministry of Foreign Affairs tried to force the VBDL to unite with the Patriotic Union, which greatly annoyed Goop, who then resigned as party leader.
According to court testimonials, he was a member of the Waffen SS until 1943.
In 1946, Goop, along with other leadership figures of the VDBL were prosecuted for his collaboration.
Goop was convicted of high treason and sentenced to thirty months in prison.
He died in 1993 in Schaan.