Actually, since national citizenship was originally derived from that of the State, it is quite correct.
Making a uniform rule is miles away from 'enforcing' anything.
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The mode by which an alien may become a citizen, has a specific appellation which refers to the same principle. It is descriptive of the operation of law as analogous to birth, and the alien, received into the community by naturalization, enjoys all the benefits which birth has conferred on the other class.
Until these rights are attained, the alien resident is under some disadvantages which are not exactly the same throughout the Union. The United States do not intermeddle with the local regulations of the states in those respects. Thus an alien may be admitted to hold lands in some states, and be incapable of doing so in others. On the other hand, there are certain incidents to the character of a citizen of the United States, with which the separate states cannot interfere.
William Rawle
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BTW - they are not 'immigrants' unless they file the paperwork. Until they do, they are resident aliens.
Well, I guess you’ll have to take it up with every Supreme Court decision ever made on the subject of immigration and enforcement. Because they all disagree with you.