US v. Wong Kim Ark. Being born on US soil makes you a US citizen, unless your parents were foreign diplomats or members of an invading army. IOW, the article is just a bunch of historical trivia.
The government had argued that Wong Kim Ark was not a citizen because, although he was born in the US, his parents were Chinese citizens, and therefore not "subject to the jurisdiction thereof [of the United States]". But obviously, the government was wrong, because otherwise furriners could park illegally with impunity just as UN diplomats do.
"The foregoing considerations and authorities irresistibly lead us to these conclusions: the Fourteenth Amendment affirms the ancient and fundamental rule of citizenship by birth within the territory, in the allegiance and under the protection of the country, including all children here born of resident aliens, with the exceptions or qualifications (as old as the rule itself) of children of foreign sovereigns or their ministers, or born on foreign public ships, or of enemies within and during a hostile occupation of part of our territory, and with the single additional exception of children of members of the Indian tribes owing direct allegiance to their several tribes. The Amendment, in clear words and in manifest intent, includes the children born, within the territory of the United States, of all other persons, of whatever race or color, domiciled within the United States. Every citizen or subject of another country, while domiciled here, is within the allegiance and the protection, and consequently subject to the jurisdiction, of the United States."
Justice Gray, 1898