The default should be to treat people with respect and give benefit of the doubt until proven otherwise, treating people as guilty because of where they were born is always a crappy thing to do.

Given that the EU after over 3.5 years of full scale invasion still buys Russian oil, should we also treat EU citizens as sponsors of the war?

Judging from this logic you would have supported the US locking up the japanese people in internment camps right? If not, why not?

Fortunately nobody was aggressive to me. It was vice versa to a point which made me deeply uncomfortable. Once people learned that I am originally from Russia (even though I am not Russian and I don't live there for many years), people in e.g. Algeria or Tunis or some SE Asia countries were shouting Russian politician names with approval. Some of them tried to lecture me on politics there, assuming I fully approve government actions. Eventually I simply stopped mentioning my origin whenever it was possible, cause I really have no desire to go into same discussion over and over again. And people won't listen anyway.