A video of dancing crew members from South Korean airline Jeju Air has led to online criticisms of tone deafness, with social media users noting that it is too soon for such lighthearted clips after the crash that killed 179 people in December.The 10-second video, titled “Feisty Flight Attendants” and uploaded on the airline’s official social media channel on July 11, showed three smiling crew members dancing, jumping and flashing V-signs. By Tuesday afternoon, it had garnered 2.2 million views...