I mean, if they have that much knowledge of WW2, then they should understand the potential of Hunka being involved with the Nazis, and/or with the war crimes on the Eastern Front. My point is that you don't even need to get to that level of depth or firmiliarity to see potential issues that could arise. Clearly they didn't consider even the basic red flags that could come with an understanding of the depth, "Soviets vs Nazis on the Eastern Front." No one involved in preparing the speech and inviting Hunka even thought to check which division he served in, nonetheless ensure he wasn't a war criminal.