[skintight buffoonery]

it has been demonstrated many times it is impossible to establish perfect border security.

No supporter of border enforcement believes that it is possible! It's certainly possible to have much better border security, though. It's impossible to have perfect national security; does that mean we should abolish the military? Does the fact that perfect enforcement of criminal law is impossible mean there's no point in having a police force?

[skintight buffoonery]

ahem, sorry, I sort of skimmed the article and misinterpreted the quoted line in my last post. Mea culpa.