He's being euphemistic: the Germans turned Poland into a human slaughterhouse.
The death camps for the Jews were obviously the worst sites, but there is almost no town you can see in Poland that doesn't have plaques on the streets commemorating the places where Poles were executed in German reprisals.
As a young girl, my mother-in-law was forced to watch 300 people be machine gunned. She said once that she could never have imagined seeing human blood run like water in the gutters.
True, though while doing it Germany considered it their land.
Geraldo Rivera on "Fox & Friends" recently asserted that the reason why the US was unwilling to let Jews in who were fleeing Germany before WWII was the fear that they were Bolsheviks.
Not the mention the hundreds of thousands of Poles slaughtered by the UPA terrorists under Stepan Bandera.