Yeah, as if "Pommern" actually means anything in German. :
Always easiest argument against German chauvinistic claims is simply etymology of Pommerania.
Gruss Gott! As an almost "ethinc German" ( born about 100 meters from the actual Polish German border I can answer that. The German word Pomerania comes from the Polish word Pomorze. That proves this whole area is obviously German! I hope this helps. Gott sei Dank. Tschuss!