Who really knows the character of the people crossing the border?
As this article states (yes, I recognize the source isn't respected):
https://www.thesun.co.uk/news/924413...mexico-border/
A CAPTURED ISIS fighter has made a chilling confession detailing how the terrorist group planned on exploiting vulnerabilities in the US border with Mexico to take advantage of smuggling routes and to target financial institutions.
and this:
https://www.dailysignal.com/2019/06/...-texas-border/
Border Patrol Catches 116 Africans at Texas Border
Bottom line with over one million people who have knowingly crossed the border just this month plus some unknown number of people who have crossed undetected this is no time to use relaxed or questionable security standards at airports.