You mention one aspect of "the Mexican American thing".
I've read different versions of "inclusion".
One involves classing all decendants of Native Americans in both North and South America as "victims of colonialism" and apportioning "reparations" to them based on a) their country of origin and b) the supposed ties of that country to "US imperialism".
Of course the concept isn't going anywhere, for now. But the idea lingers on. The only bad guys in all of history are the Europeans who came to the Americas, including those (like my grandparents) who were landless peasants living in harsh conditions back "home".
All the rest of what some folks have planned is just pure BS.