White ethnocentrism, and to a lesser extent nationalism, although possibly decreasing somewhat, is the farthest thing from marginal in today's world (which explains the backlash), especially considering that there are a lot fewer white people by numbers than there are people of other races. Maybe you haven't experienced much of it personally, but those with money don't exactly mingle with your kind too much. Ethnocentrism and nationalism isn't merely promoted on a person-to-person level, as a minority of the white population overwhelmingly in positions of power and influence can promote it to the masses in many ways (advertising, branding, popular art like film, music and literature, etc) and as well can implement it in many ways (laws, policies, wars, economic manipulation, etc), entrenching it in the marketplace of ideas.