> we get to run background checks and see if someone's been hanging out in Pakistan Frontier Provinces or Yemen lately.

You are overestimating the competence of the US government.

> If someone looks sketchy, we boot them out.

So dress nice and talk a lot of crap and they let you in.

>CBPs make wrong decisions sometimes. This wasn't one of those times.

Yay for security theater. I am glad someone feels safer.