Fool hardy people exist everywhere. They act on the spur of the moment and do not think ahead. They do not know why they do what they do but, if asked, then, in retrospect, they can come up with a plausible excuse for why they said “feets, do your thing.”
Migration is normal. Wanting people to stay in place so they are easy to exploit is also normal but, if we are committed to liberty and autonomy, not moral. On average, U.S. residents relocate ever two years. Since some never move in their whole lives, that means some relocate way more often. That makes them very hard to manage.
I suspect it was hoped that a pension for old people would motivate them to stay home. Instead, retirees take to the road in motor homes. Then it was hoped that the dispensing of medication would keep people tied to their pharmacy and health care providers. That people actually wanted to “keep” their doctors turned out to be wishful thinking.
What people want is to go where they want, when they want and with whom they want. So, kidnapping migrants’ children was a giant miscalculation. It would not teach people to stay home and practice obedience. Rather, it is revealing that the essence of liberty is not speech, but mobility. Doing it in a cage with wheels was a compromise. If the compromise is dishonored, people will just say “feets, do your thing.”