But they're a lot easier to group together than any other races. Like most other races, they have similar cultural values (parents/family is the most important thing, education is a close second), they have some shared experience (India was under British control for a period of time, China and Southeast Asia were both at least under European influence, if not control (See: Vietnam)).

So how would you group them? People from the Middle East at least share a common religion, even with many North Africans, and are arguably a significant subgroup of "Asians" overall, but the average Indian is a lot closer to the average East Asian individual in general. Buddhist ideas are stemmed from Indian religious ideas, and plenty of shared cultural beliefs exist.