The vast majority of Russian holidaymakers that I encountered on holiday in Goa
Are, as you seem to have recognised from your wording, not the same as “the vast majority of Russians” so you may get away with that comment.
Many years ago when I worked in a casino, the people who came in who were Chinese (okay, looked Chinese and had accents) were without exception rude and arrogant. After a while I realised that I was developing racist views towards Chinese people (i.e. including Chinese people I encountered other than over a roulette table). I had strong words with myself. I’m a sanctimonious guardian reader with white middle class guilt aplenty but still found it ridiculously easy to veer into irrational stereotyping. Scary really.