It is only the latest dispute between the two Slavic nations over how to remember the war.
Poles remember being invaded by both Nazi Germany and the Soviet Union at the start of a conflict that left 6 million of its people dead. Warsaw considers both powers to have been aggressors who unleashed mass suffering and death.
Russia focuses on the Soviet sacrifices that came after Germany invaded the Soviet Union in 1941, which brought the Soviets into the war on the side of the Allies. Some 27 million Soviet citizens died in the fight to free Europe from Nazi terror.
Putin has called the EP resolution "sheer nonsense."
The war began days after Adolf Hitler and Soviet dictator Josef Stalin agreed to carve up Poland and the Baltic states based on a secret protocol in the Molotov-Ribbentrop pact they signed on Aug, 23, 1939.
Putin has been casting the Molotov-Ribbentrop treaty as a move the Soviet Union was forced into following nonaggression agreements some other European nations had signed with Hitler.
He cited a 1938 agreement reached by Germany, Britain, France and Italy that allowed Hitler to annex Czechoslovakia as an example of Western leaders' alleged "collusion" with Hitler.
Putin cited archive documents that he claimed showed the Polish ambassador to Berlin praising Hitler's plans to rid Europe of Jews.
In an angry outburst, Putin denounced the ambassador as a "scum" and "anti-Semitic swine."