That there were antisemitic Poles is not likely to be doubted, as antisemitism was abroad in the European land, and long before the Nazis took over.
As noted above, Poles played a crucial part in the defeat of Hitler through their compromise of German codes.
Does this historical revisionism relate to the Poles resistance to islamic suicide? Is it a campaign by left wing crackpots to further divide the West? Maybe, just maybe, this dog should be let lie.
I suspect it’s left wing hatred against a population that wishes to remain religiously Catholic and moral.
It is very important to note that while SS divisions were raised from volunteers in many occupied countries (Norway, Belgium, Denmark, etc.), there was no SS division of Poles. A large number fought for the Allies, on the other hand, and while it was assumed they would serve a free Poland after the war the West betrayed them.
You do realize there were large areas made up of German speaking slavs/prussians throughout Poland and Czech republic. The borders in these lands have moved and shifted for centuries... I always use the example that Mozart is considered a German composer... because Salzburg used to be part of Bavaria, not Austria.
I think that the recent obsession with putting disproportionate blame on Poles as Nazi collaborators is mostly due to the fact that Poland doesn't play along with the EU agenda. Polish nationalism and social conservatism stands in the way of EU internationalism and social radicalism. In contrast, the German government is not only on board with the internationalist EU program, it is spearheading it. Consequently, modern Polish nationalism gets retrojected back to World War II as "Nazism" to fit the narrative.
Blaming Poland for the Holocaust and referring to Nazi concentration camps in Poland as "Polish" (implying that they were created by Poland, as opposed to just being located there) is absurd. As you said, some individual Poles did collaborate with the Nazis, as did some people in virtually every occupied country (and some that weren't even occupied). But the Polish government never became a puppet of the Nazis and there was no support for the Nazis at an institutional level in Poland - mainly because the Nazis treated Poles only marginally better than they treated Jews. Poland actually put up a stronger resistance to Hitler than many other countries that the Nazis occupied, and those who claim otherwise are either historically ignorant or lying to advance their own agendas.