That is the topic of my latest Bloomberg article, here is one bit:
What is striking about immigration, and immigration policy, is the very simple but oft neglected fact that it concerns human bodies. Any exercise of immigration law thus requires some violence, either explicit or implicit, against those bodies. It will mean the rounding up and forcible restraint of bodies, the widespread use of prisons and other coercive holding chambers, and tearful scenes of airport separation. Those methods will be applied to individuals who do not enjoy the full protections of the U.S. Constitution, who are vulnerable to mistreatment during the process, and who do not always have full fluency in the English language or a full understanding of their legal rights. The resulting problems are especially high costs, not only because of the associated dollars, but also because our precious self-image as a humane country implies keeping such episodes to a minimum. Too many violent stories and images, even when they technically can be justified by laws, damage our conception of our country. Eventually that will shape our future behavior and not for the better.
A somewhat lax enforcement of immigration restrictions is in fact the friend of the future of the rule of law, not the enemy.
Do read the whole thing.