They swapped seats to Sit TOGETHER. They are not all from the same religious or ethnic group. These do not tick the same boxes as 9/11. Also given the level of paranoia & latest information actual terrorists are looking more white, normal & low profile. The were boarding an International flight & therefore were probably finger printed & & their passports scanned to be validated.
I think the captain would be hard pressed to find a job for better money if & when he applies for a position on an International carrier that flies more eastwards. He will probably off load all his passengers out of certain flights & definitely be jumpy with the look of many of the crews that service his aircraft from the sand pit onwards.
They should get compensation & he should get an all expenses paid tickets on Emirates doing multiple pit stops eastwards.