The Indian tribes, being within the territorial limits of the United States, were not, strictly speaking, foreign States; but they were ALIEN NATIONS.<quoted text>
The rationale of having the phrase "subject to the jurisdiction thereof" in the first sentence of the 14th Amendment wherein it set forth who is a citizen of the United States is to EXCLUDE indians who were members of tribes that existed within the boundaries of the United States. Congress acknowledged that INDIANS were not citizens despite the fact that they lived with the borders of the United States.
That is why the Civil Rights Act of 1866 had language that excluding INDIANS as citizens:
"Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That all persons born in the United States and not subject to any foreign power, EXCLUDING INDIANS NOT TAXED, are hereby declared to be citizens of the United States"
In Elk v. Wilkins, 112 U.S. 94 (1884), Justice Gray noted the legal status of Indians tribes and their members:
The Indian tribes, being within the territorial limits of the United States, were not, strictly speaking, foreign States; but they were ALIEN NATIONS, DISTINCT POLITICAL COMMUNITIES, with whom the United States might and habitually did deal, as they thought fit, either through treaties made by the President and Senate, or through acts of Congress in the ordinary forms of legislation. The members of those tribes OWED IMMEDIATE ALLEGIANCE TO THEIR SEVERAL TRIBES. and were not part of the people of the United States. Id at 99
The drafters of the 14th Amendment understood that Indians were not citizens of the United States and as such incorporated "subject to the jurisdictioni thereof" language in the 14th Amendment to EXCLUDE them in setting forth who is a citizen of the United States.
Your folderol theory that this language also exludes aliens as being subject of the jurisdiction of the United States has no basis in fact or in law.
Do yourself a favor and read the congressional debates during the drafting of the 14th Amendment.
You shot yourself, last time I checked all Nations other than the US, are Alien Nations.