That's the really tricky part with racism, not the mindless extremism. What is the acceptable limit between rationalism and racism? Is there one? If we take the example of the GP with Russian secret services, if 99% of the Russian speaking people you encounter are from the secret services, does it make it acceptable to discriminate against the 1% to save your life? If yes, then what is the limit? 50%, 10%, just one person, ...?
No court. No sensible attempts to truly examine the truth. Just a firing squad.
In this context, even "Good" Russians, fear the "Bad" Russians, for they may be labelled 'collaborators', and face the firing squad too.