I cannot speak to rape nor Russia vs Germany, but for the suffering of the Poles at German hands I am compelled to add this from my eyewitness family history lest German abuse of Poland be discounted.

It is not often discussed, but millions of Poles, not just Jews or Jewish Poles were killed in concentration camps.

This (sans "millions" which is my own research finding) was my grandfather's observation as a US officer liberating such camps- there were a lot of non Jewish Poles in such places.

"Lebensraum" came through Polish genocide from what I can tell.

(I am not Polish.)