It is incorrect to think that the "American Indian" is "the only real American". Several points to ponder are:
The North American continent was initially populated by the exploration of Nordics, Polynesians, Chinese, and others... so the "Native American" peoples are also the descendants of "immigrants".
Inhabitants prior to the governmental formation of the United States of America are not "Americans"... America did not exist yet.
So perhaps the first "real" Americans are the ones who formed the "United States of America" and actually lived, loved, and built the "American Nation" upon this continent.
The "Indian" tribal peoples still choose to belong to their own sovereign nations with their own governmental entities, living within the United States, yet selectively separate.
Modern America is a land of immigrants with all the wonders and woes that diversity offers. Unfortunately, because more people seem only interested in "colonizing" this nation than assimilating into it and "becoming Americans," there may soon no longer be a "United States".
Once again, the natives are restless.