A black, British friend of mine applied for a command position with Korean Air, all initial feedback from the agency was positive, he sent his logbooks etc for assessment, and got invited out to Korea to do the sim check. He sent his passport (with his photo in obviously) to arrange the visa and ticket, and they suddenly realized - he got a curt email that the position was no longer available, and they cut off all further contact with him when he enquired as to why not
Middle East airlines have plenty of other problems, but race discrimination is not one of them