What's easier... "profiling" in immigration and at airports, or sending Scotch-Irish from Appalachia and other America's young to fight house-to-house in foothills of Hindu Kush or Yemen?
The first course is "Not Who We Are" so Sasse (a JAG I believe lol) sacrifices the youth
I think the safest lowest-cost way is not to let in those plotters into the USA through its airports and open borders. After 9/11 an average 100K "immigrants" per year from ME countries allowed (legally) into the country plus a busted open southern border.