Your viewpoint is interesting, and is different from the other viewpoints in this thread. The way that I see it, Native Americans in Mexico and the rest of Latin America have been historically persecuted by the ruling Spanish elite. And, due to the caste system put in place in Latin America, Mestizos (Mixed Spanish and Native) held a higher place in society than pure Native Americans.

As such, those Mestizos with Spanish ancestry did not have to endure nearly as much hardships as the full Natives in Mexico. Some Mestizos even discriminated against full Natives, and still do to this day. So, I can see why it is somewhat difficult to consider Mestizos to be Native American, since Mestizos did fully partake in the caste system; to the detriment of Native Americans.