"But, yeah Poland's economy was behind, because Germans for over 100 years oppressed Poland"
Poland's economy is still behind, so who is oppressing you now? Who do you have to blame? Poland is not a Net Contributor to the EU because it's one of the poorer nations, it's GDP is 70% of the EU average.
My nation is the second wealthiest nation in the EU and we are a Net Contributor and our GDP is one third higher 129% than the EU average.
What does Poland's level of wealth have to do with Germans being a complete violent menace who started much of the worst wars, or genocides the World has ever seen?
Deflecting from the fact that Germans are a complete menace blemish on our society, and still are with the EU / Merkel supporting Islamic refugees down everyone's throats?
Besides,
It took nations like Ireland, and Finland which were once far behind economically about 60 years to catch up to Western European EU averages.
Poland's actually is catching up, and arguably faster than those nations had.... Considering Poland's been rebounding from Communism less than 30 years...