As I have pointed out ad infinitum in the past, for a Monarchy, grabbing the children of foreigners in your country is a feature not a bug. It has the practical effect of instantly creating more servants (which is what a "Subject" really is) for the King.
And we are not the first people to notice how useful such a thing is for a Monarchy, but how inappropriate it is for a Republic.
The child is pinned down in the place of his nativity as a prison; and, unto its local authorities is forever in thralldom.
Potent stuff. Gee, maybe THAT'S why the Founders insisted the federal government not follow English common law.....ya think? LOL!