How does anyone become a US citizen if they were not born overseas and issued a consular record of birth?

The passport says United States of America and lists that as the nationality.

Even an immigrant who takes the oath becomes a citizen of the United States of America (and not citizen of the United States). If "United States" and "United States of America" were identical, they would not have to mention them separately:

8 USC §1449. Certificate of naturalization; contents

A person admitted to citizenship in conformity with the provisions of this subchapter shall be entitled upon such admission to receive from the Attorney General a certificate of naturalization, which shall contain substantially the following information: Number of application for naturalization; number of certificate of naturalization; date of naturalization; name, signature, place of residence, autographed photograph, and personal description of the naturalized person, including age, sex, marital status, and country of former nationality; location of the district office of the Service in which the application was filed and the title, authority, and location of the official or court administering the oath of allegiance; statement that the Attorney General, having found that the applicant had complied in all respects with all of the applicable provisions of the naturalization laws of the United States, and was entitled to be admitted a citizen of the United States of America, thereupon ordered that the applicant be admitted as a citizen of the United States of America; attestation of an immigration officer; and the seal of the Department of Justice.

United States of America belongs to the United Nations, not the United States.

8 USC fails to define United States as the 50 states of the Union. By what operation of law does a birth certificate from a state of the Union prove birth in the United States?

Tax laws apply to U.S. citizens and not to U.S.A. nationals.

The form to give up nationality is entitled OATH/AFFIRMATION OF RENUNCIATION OF NATIONALITY OF UNITED STATES

What do I know, I am not a lawyer or politician!