It wasn't eye for eye. It was finger for head. Germany cut Poland's head, and Poland cut Germany's finger in revenge.
OK - maybe one entire arm, not just one finger.
War is brutal and everyone commited terrible crimes. Also Western Allies literally bombed German cities - full of civilians - into rabble.
My grandfather witnessed the bombing of Hamburg, for example. He was a forced labour worker in that area:
http://en.wikipedia.org/wiki/Forced_labour_under_German_rule_during_World_War_II
I am quite sure that Western Allies were responsible for more German civilian deaths than Poles.
Instead of quarreling on who commited more crimes, we should do everything to prevent major wars in Europe in the future.
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BTW - Winner asked why I started this thread. Obviously I am not saying that Vilnius should be given back to Poland.
I just want to say that rights of Polish minority in Lithuania should be respected by Lithuanian authorities. And their Polish heritage as well.
Polish minority in Lithuania enjoys nowhere near as many rights as Lithuanian and German minorities enjoy in modern Poland.
As for Polish people in Germany - they are not even recognized as a national minority there (unlike Sorbs, Frisians, etc.).