Yeah...because it was a german town by then...part of Germany.
Sure, but then here a big word - partitions of Poland.
There was never change in hell that Poland would agree to be cut off from the Baltics sea, right in the middle, the estuary of the river Vistula. So the will of residents doesn't change much and doesn't means much as it didn't in 1794. Its geopolitical and strategic interests at play. It is rather a German state that had been extended too far to the east a waaay beyond its strategic boundaries and a geopolitical place. It was only possible due to the fact of disappearance of the Kingdom of Poland. A freak accident not a rule.
.The Treaty of Versailles
dude, you cry so much about that treaty. How unfair it was. Well, it is a question of a perspective and you know as a German and a Prussian you shouldn't be so hasty to call others on not being fair.
Contributions? After Franco- German war in 1870 Germany not only annexed French territory but imposed a huge contribution on the Frenchies that allowed them to build up the German infrastructure and manufactures.
Loss of the land. Come on - when it comes to the east it wasn't loss if you compere it to the border from the 1772. Yes if you compare it to the border from the 1914 that is a great lose. So here let me pose a question - why would you do that if you are not a German nationalist? eh?
From the Polish perspective it was only a restitution - not even a gain.. Hell Poland didn't even get Gdansk back. My take on this is that you have no cause to whine about it. Not really.
That was expulsion, de-population, exchange of population or whatever you want to call it including theft of their properties by victors "law" !
Not really. If there were some irregularities that goes both ways. Ante bellum Poland wouldn't have that big German minority it had if your story were 100% correct.
Is not as if Germany wouldn't or didn't do the same and worse if the circumstances were reversed.