I think most mexicans are mixed of the native mexican people and spannish. There are much less white mexicans though then the typical mexican.  Also alot of the seemingly white mexicans I have met living in the US consiter themself not white(just mexican). I think that tends to happen because of the mass immigration issues maybe they feel they need to pick a racial side im not sure but its something ive noticed. It's probably because they are mestizos with alot of White blood. Some of those mestizos look like they could pass as Spaniards. I read somewhere the average mestizo Mexican is on average anywhere from 30-60% White. So there are plenty of mestizos with more White blood in them than indian and could probably pass as White if they really wanted to, but they don't identify with the White side. Sort of like those Jews who are like 1/4 Jewish and look White and could easily just assimilate but consider themselves Jews and not White.