As we all know, anti-German propaganda was massive, including endless examples of false, contrived "translations".
You need to do better.
Please show us the originals.
Always the same issue. No remotely verifiable sources. Snipets, conflated with other stuff, opinion and interpretations into the text or facts. Also ignoring evidence to the contrary is common in that matter.
When most of your fighting age man are at the front, it's obviously why extramarital relationships would be punished. Got nothing to do with "racial reasons".
Also, collecting usable snippets from the contemporary literature is also not proof. One will always have a spectrum of opinions on any subject.
What counts are actual policy statements - speeches, opinions would only be circumstantial. Depends also on who said it.
I got no doubt that there were bad vibes against Poles, given their treatment of ethnic Germans as long as they had occupied the corridor and Eastern Silesia. Some of the Eastern European population were also quite troublesome, unreliable and even showing some propensity to cruelty. No surprise given that they had to live under Bolshevism for more than 20 years. It had been an onslaught on their culture as well.
Fact is that Slovaks, Croats, Ukrainians, etc. have been allied with the Axis. That's an indicator that they were considered "racially acceptable". As for Russians the Tartar admixture may have been seen as problematic. But nations aren't necessarily a homogenous mass. I noticed that with populations that are more diverse, there is also a diversity over socio-economic and behavioural indicators.