Cynic in me says they are looking for someone who can be implicated as a terrorist supporter to be used to justify the ban.
Funny thing about that...
Trumps actual order has an exception for immigrants who are already in transit, viz section (e): "[...] when the person is already in transit and denying admission would cause undue hardship -- and it would not pose a risk to the security or welfare of the United States."
So holding people up at US airports just some ICE pricks trying to make a false narrative to paint Trump in a bad light.
I'd say you hadn't read the article you linked to, but since you quote it, and seem capable of English comprehension, I can only assume you are deliberately trying to mispresent the case. The "ICE pricks" are doing exactly what Trump has decreed. You conveniently left out the start of the section, which includes as the beginning...the Secretaries of State and Homeland Security may jointly determine to admit individuals to the United States as refugees on a case-by-case basis...[including] when the person is already in transit...
So those 'ICE pricks' have no discretion. BOTH Secretaries of State AND Homeland Security must apply that "in transit exemption". AND they can't even do it by a class or group - they have to give approval for each individual. Before they can enter.
AND this exception only applied to refugees. Not to tourists or people visiting their families.