Well being of Hungarian ancestry I dispute the first part of your comment 
But yes I agree this is nuts. And is the Polish government denying that there was a Holocaust/Genocide that took place in Poland during the war or does the Polish government take issue with the implication that it was the Polish people that were responsible?
This is what they take offense to....
Obama “Polish Death Camps”
https://www.youtube.com/watch?v=qXhlTKQufPg
I think its the latter. The poles bristle at the idea that they were complicit with the Germans. They feel they were occupied by ruthless thugs and most tried to do what they could while others did what they thought was required to survive. There are always a few cowards anywhere. The poles had it very tough. They were invaded first by the Germans then soon by the Russians who stayed for 40 years. Nobody should question them, after what they went through. And anybody who was 20 years old then in 46 is over 90 today. So there are no individuals to punish.