But the fact remains that Prussia was a predatory nation. And she did some of her most beneficial (to her) aggression in the Polish partitions while she was at peace. And she was rapacious at the Congress of Vienna, grabbing as much of western Germany that she could, and the Rhinelanders and Saxons were not happy at all of being now part of Prussia. Spreading the 'guilt' around does not nullify Prussia's conduct.
I was alluding to both Wars I and II. World War I was not the sole responsibility of Germany, not by a long shot. And blaming Germany for that at Versailles was both irresponsible and feckless on the part of the allies. That being said, if the German government in August 1914 had told their ally Austria-Hungary to pull back and exercise some judgment, the cataclysm might have been at least postponed. And the Kaiser's desire to beat Great Britain in a naval arms race was both foolish and to the allies' long term benefit. I don't believe we need to discuss War II.