Following World War II their Upper Silesian hometown became part of the People's Republic of Poland and Hupka and his mother were expelled to West Germany.
His opinions, which were regarded as revanchist, made him unpopular not only with the left, as he opposed the recognition of the Oder-Neiße border with the People's Republic of Poland.
Hupka was one of the Landsmannschaft's members who refused to change the theme, thereby conflicting heavily with Kohl, leader of the CDU.
Hupka, once the target of Polish and Soviet communist (and nationalist) propaganda, was later employed as an advisor by the local government of present-day Silesia and was awarded the title of an honorary citizen of Racibórz, the historic town of his youth.
Later in life, Hupka partially gave up his former views on totally restoring the pre-1945 borders of Germany and became a conditional supporter of the German-Polish rapprochement.