Except when you try to cross swords with Russians who firmly believe that the Rus originated in Russia.
That's not entirely correct.
Actually this statement is wrong.
The 'Russians' do not "firmly believe that the Rus originated in Russia".
The majority of the Russians agree that "Scandinavian nobles and traders mixed themselves with their slavic counterparts. Rus' royalty is as well issued from Vikings than Slavic origin... and so on".
It is a common knowledge even among the 'ordinary' folk:
for instance if nowadays there is some mess in the firm/organization and there is a hope that some top manager from outside can do some useful crisis management the Russians say:
- Let's call to a 'Varangian' for help!
And every Russian understands the meaning of this old saying (no doubt referring to the ancient legend about Slavs calling 'Varangian Rus' for help "as crisis managers"
Of course there are some Russian ultra-patriots who thinks that this historical fact somehow humiliates them.
As for me - I do not.
On the contrary i think this is funny.
My uncle worked as a 'master' (a captain of a sea ship) and him being Russian he looked 100% Norwegian or a Swede with his red beard, a smoking pipe etc. When being abroad he was always mistakingly identified by them as their own.
My brother looks absolutely 'Norman' as well. Even without beard and smoking pipe

It is about genotype mostly, looking alike. The same mistaken identity is usual with him

The Finns or other Scandinavians may start speaking to him in their language in the street.

I went after our father, I am more 'Russian'-looking.