More concerned? I think rightfully so as the clues of deception mount.<quoted text>
If they come from "further south", they likely enter through Mexico.
If they come directly from the "middle east and Africa", should be easy to stop them at immigration by tightening visa programs.
Galt is more concerned about Muslims and Africans than about Mexicans.
Deception is endemic among those who abide by Islamic doctrine. IMAO.