Poland's western lands legitimately (...) belong to the modern German state
Brilliant. So, we give
Ziemie Odzyskane back to Germany. What happens next? Who will live there?
Former DDR lands are depopulating, and many smaller towns are already deserted, so who will come to "former" Poland? Ethnic Germans have negative birth rates and about 25% of their population have migrant roots, so whom will they send to live here? Syrians or Turks? Besides, what's the point? Poland and Germany are both in the EU, so if any German wants to come to live and work in Poland (and vice versa) they are free to do so any time.
It would be the same thing if Poland ever "regained" her former lands in Belarus and Ukraine. Who would move there, with negative birth rates and Poles flocking to large cities? Total stupidity. Far right politicians should play Europa Universalis or Hearts of Iron and conquer all the lands to their hearts content but let's keep the idiots away from real politics.
*rolls eyes*