Tu quoque won't get you anywhere.
So you can say "oh my, russians are evil, let's just ignore anything they say"? It's sounds like yours "xenophobia".
Nobody tries to convince everyone that anti-norse theories are right. There is not enough evidence. I'm okay with any nationality delevopers will pick, because they just need to pick one.
But position like ''let's ignore all russian theories because they are russian and propaganda" looks very ugly to me.