One of the essential attributes of a nation is its ability to define itself. A nation should be able to say with certainty – and determine – who is allowed in and who is not.
Those without permission should be prevented from entering. Those who enter without permission should be swiftly expelled.
Finally, a nation ought to consistently and reflexively privilege its own. Whether they are citizens, subjects or neighbors, any nation that is a nation serves its own people first — and at an expansive range of points...