This is 100% true and I wish we did the same, but in fact we do not. Actually, it is those of us who are of "Anglo" heritage who are the least likely to be into these issues, unfortunately. Italians are strongly also identified with their origin, as are Greeks. We do not. Interesting thing about hispanics: Spaniards themselves are very UNLIKELY to feel proud of their heritage too. In places like Argentina, there are areas known as the "Italian" neighborhood or zone, but you never hear of a "Spaniard" neighborhood in Latin America. Here in the US, you get places like Little Italy, or Little Greece and you never really get "Little Spain" and that may be due to the fact that many Spaniards identify more with their region than with their "state". So in that sense they are similar to the British.
Speaking personally, I am a rarity because to me racial origins are also CENTRAL to who I am and how I perceive myself. I strongly believe in rationalism and a strong dose of racial determinism. No, I do not believe race determines your morals or how you act in every single situation, but to deny the reality of genetics is absolutely insulting. A horse is a horse, whether it is born in China or the Patagonia. Our "tics", habits, and instincts when it comes to certain cultural aspects are handed down by family, which is the result of genes. No man is an island. We are born into a family, we have genes and, we have a race. The lucky among us can identify with ONE race or origin, we are not "all mixed" as some clowns today say. And we are not "All immigrants" as so many stupid and ignorant people claim.