Let us be clear about what happened in 1939; Germany invaded western Poland and DIVIDED IT with the USSR, who invaded the eastern portion (in 1939) and committed the Katyn Massacre (among other things). Britain and France declared war only against Germany for the invasion of Poland, and when Operation Barbarossa started in 1941 the Germans discovered mass graves in eastern Poland of the USSR’s victims. The International Red Cross confirmed the deaths were from the Soviet occupation (based on the decomposition of the corpses and their clothing), yet the Allies continued to maintain the lie that the Nazis had killed them (FWIF, after the wall came down Russia admitted they did it). In addition to occupying the new Baltic states of Latvia, Lithuania, and Estonia in 1939, the USSR also seized part of Finland during the Winter War of 1940 (and again, no help came from the West to protect them from the Bolsheviks).
Basically, Poland controlled no territory in which to operate any camps, and they were 100% occupied - 1/2 with the Allies’ blessings. Unlike other occupied countries, Poland fought against the Nazis until conquered - then rose up in 1944 to throw off the yoke of Nazism again (and the USSR held their ground instead of helping). Any attempts to smear Poland with Holocaust participation are merely Western attempts to hide their own complicity in what happened throughout eastern Europe from 1939 through 1989.
Some individual Poles did some bad things towards Jews during the occupation, this is true.
But that’s no different than what happened in Holland, France, Belgium or any other Nazi-occupied country. Yet only Poland is singled-out.