How far back to take it?

In 2007, Poland, under then prime minister Jarosław Kaczyński (one half of the twins who ruled Poland at the time, with his brother Lech as president), caused consternation in Germany and indeed throughout Europe when it demanded extra voting weight in European decision-making (proportionally allocated to population size) because of all the Poles murdered by the Nazis in World War Two.  To compare Germany's current politicians with the Third Reich was unspeakably rude and did not advance Poland's cause one iota.
Previously, the twins had accused Berlin of 'historical amnesia'.  Similar phrases are now emanating out of Athens as the wrangle over Greek obligations within the Eurozone continues.  Similarly to the abrasive Kaczyńskis, high-ranking Syriza members (the dominant coalition party in the Greek government) are claiming they will not pay any scheduled debt until Germany compensates Greece with reparations for all the war damage inflicted upon the 'cradle of European civilisation' during World War Two.  If we want to go back in history, what about charging the city of Venice and the families of the German mercenaries employed in trying to dislodge the Turks from Athens at the start of the 18th century; the Venetian-employed mercenaries identified the Parthenon as harbouring a major Turkish gunpowder magazine (not to mention a refuge for women and children) for the Turks thought no-one would ever shell such a cultural artefact.  The Turks were wrong.  The Germans mortared it, blowing up the gunpowder (and the women and children to pieces) and sending the canopy of the Parthenon crashing to the ground.  If we are going back far enough, the island of Melos should reassert its independence from Athens, declare itself not a party to Greek debt and there resolve a 2,500-year old injustice.
The ironic thing is that Germany has largely come to terms with its Nazi past through a very painful process, exacerbated by being divided into two states.  Angela Merkel, on a recent visit to Japan, was right to point out that Japan never had to undergo a pentitential process and because of this, positive relations with its neighbours are not possible.  There are major sections of Japanese society who still believe their last war in the Pacific was a defensive one, that China and Korea were relatively untouched and that no war crimes were committed.  School textbooks have been sanitised to omit uncomfortable truths.  Whereas Germany was divided, Japan had no such existential partition and was quickly built up by the West to stand as a bastion against Asian communism, the zaibatsu corporations not being broken up as they should have been.  Prime Minister Shinzo Abe wants to change the Japanese constitution to permit troop deployments abroad but until the Empire of Nippon has a reckoning with its past, this is very bad move.  The next time some unpleasant maverick wants to equate Germany now with Germany of 1933-1945, they should be shouted down but we should also think of Japan too.