Not every German participated in the Holocaust either. It seems rather odd to pass a bill that would give prison time to anyone who mentions Polish concentration camps.
There is a big difference between saying there where German Nazi death camps in Poland and saying they where Polish concentration camps... Saying they where Polish concentration camps is saying that they where set up and run by the Polish nation.. When the truth of the matter is that they where set up and run by the occupation forces of Germany.. They where nazi German concentration camps located in occupied Poland..
So i am sure that if the people who mention them refer to them as Nazi German run concentration camps then the polish authroties would have no problem with that.. Because it would not be accusing Poland of carrying out an act of genocide against the Jewish people..
And yes there where Nazi sympathizers all over Europe during those years.. Many nations had their own Nazi parties.. and the German army had units of volunteer troops from most nations of Europe.. So of course some of the Polish people where like minded to the German Nazies.. To then say that the camps where the responsibility of Poland is unjust..
We all know that today there are people in ISIS who are US Citizens.. If in 40 years people start saying that ISIS was an American organization that carried out Jihad in Syria and Iraq and the USA is therefore responsible for all the deaths in Syria and Iraq in that conflict,, i would expect the US government to not be too pleased with such an accusation being charged against the American people..