it's been a priority of the Heritage Foundation and the right wing judiciary screening program for over 50 years. These judges were hand picked and brought up specifically with this goal in mind. White Nationalist lore states that anyone who wasn't here before the Civil War isn't a real American and shouldn't be a citizen. They see Irish, Italian, Slavic, Jewish, Polish, and other Celtic immigrants as hostile invaders of their Anglo-Saxon Protestant nation. So it's not just about this one step; it's about using this to go back and say "the 14th Amendment was only valid one time for people born before 1868." After that then they can change laws progressively to remove citizenship for 2nd, then 3rd, then 4th, then 5th generation people. After all, how many Americans with non-Anglo-Saxon ancestry can actually prove their great grandparents got US citizenship before their grandparents were born? Probably about zero. Once you have 40% of the population who can't legally work, can't legally get a bank account, can't legally get a passport to leave the country, can't legally vote, and have no other citizenship or any protection from another nation, then you have a class of people who you can detain, imprison, force to labour for you, deport anywhere to be sold into slavery, or really anything else you want; they basically aren't even people anymore and no border will ever let them escape. This is exactly what Mao, Stalin, Chauchescu, Adolf, Moussilini, the Young Turks, and so many other dictators have done to solidify their power and fix this labour problems. Building nice stuff for your loyalists without high taxes here a lot easier when you're selling billions of dollars of goods and building trillions of dollars of infrastructure without paying for or even properly feeding and housing the workers doing it all. It's another dark part of history that many groups realized what was going to happen, realized they'd lost any hope of escaping the nation, and so they all agreed to end their own lives collectively to prevent themselves being used by the people who took everything from them. So yeah. This has always been on the wish list and it's far darker than even this bit suggests.