"The Sonoran and Chihuahuan Deserts that form the bulk of the American-Mexican border regions are among the most dangerous, desolate regions of the planet. That makes it a good border–it is hard to cross.
The point isn’t just that the Gaza Wall is porous, but that Gaza’s under-wall traffic is fairly regular – items and people go back and forth often.
"... Keep in mind that net migration from Mexico to the United States has been negative for nearly a decade.
All true. (What's more, it can only be accomplished with a lavish use of eminent domain. Anyone who grasps that property rights are the foundation of civilization should be aghast.)
Americans who are afraid we'll be being flooded with criminals from the south need to understand that a wall will make this *more* likely, and why.