Continued blatant discrimination
There is no question that USA border forces need to check and double check those passing into the country, even from Canada. However, since the Iranian origin of both husband and wife were well documented, and the husband worked for Microsoft which is significantly more easily verifiable, there is little reason to suspect that a check would take an inordinate amount of time or effort.
Furthermore, readers must remember that USA immigration/Border Patrol have exercised blatant discrimination for decades, even in recent past when Mo Farah, 2012 British Olympics champion, leading a UK government sponsored International Public Relations tour passing through USA was alone held at USA border because of his ancestry - of being born in Somalia. Of the more than 16 other western nations on the tour, the UK contingent did not experience such poor treatment or attitude in any other country.
Note that Farah's family brought him to UK at age eight, and neither he nor his parents have ever returned to that country.
Also note that Farah was the only person of colour in the British contingent, was the team leader and none of the other team members were held in custody.
I understand that even those Americans that closely follow International sports like the 2012 Olympics in London, would unlikely have an inclination to know about or remember Mo Farah as ultimately the most successful track athlete of the games, especially not being American, and non-white in that instance.
What is not but should be considered more closely is the culture and negative attitude here in USA of anti - any other country, culture or ethnicity that is not born of White Anglo-Saxon Protestant ancestry, no matter the circumstances.
This is recorded fact! - not any personal opinion