Jews, who formed such a large part of the emigration from the Soviet Union in the 1970s and 1980s to the USA, often bristle at being called "Russian". Yes, their language is now Russian after Eastern Europe's Jews have shifted away from Yiddish, but they still don't consider themselves Russians. For example, my own mother-in-law is a member of this emigre demographic and insists on being referred to as "a Jew from the Soviet Union".