:::::::::That it's a slur is not just my opinion. This is racism. Period. I know, "ad hitlerum" is bad argument, but to put a blame on the whole ethnos is what Hitler did. And "pretty standard among historians" does not make it sound not racism: it is just these historians don't give a shit. These same "historians" happily wrote about Polsih death camps. If you don't like the term "Polish collaborators", you could have used  "collaborators and antisemites", but no, you want to willify Poles. Sorry, no pasaran.