So you really think you can stop every single person from slipping into the country? You know better than that.
No, but we can stop many.
Stopping many is not acceptable. At least that's what those opposed to background checks always say.
Destroy the nest. Completely.
Kill them all. Kill them. Kill their wives and children. They are not salvageable.
Cruel? Indelicate? Insensitive? Tough titty. You think they train their kids as future diplomats?
This will never stop until the Islamists are so beaten into the dirt that they cannot get up again.