“When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature’s God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation ... “
Need I continue with the History lesson?
Few if any seem to have the stomach for that now.
The issue with your solution is that people would need a “place to go.”
When those words were written, it was us against a nation across an ocean. In the Civil War the lines were clear—and mostly along geographic borders.
Those things don’t exist today.