This is a bad comparison. "White" is about as informative as "European" or "Indian". It conveys a vague notion of melanin levels and little else. Regions such as Europe or India are so diverse that a Finn and a Spaniard have very little in common. Same goes for a "Country" like India.
Someone from BC and someone from Texas actually have a lot in common - both are from immigrant societies and both speak the same language. Can't say that for someone from Kerala, India and Punjab, also in India.