NEW HAVEN, Connecticut -- Grace Kao got into BTS and K-pop by accident. In April 2019, the sociology professor at Yale University was deeply impressed when she saw the Korean boy band on Saturday Night Live, a TV show that she had watched since she was a child. “SNL was around from the ’70s. I always remembered the musical guests, and they never had Asians. I really enjoyed the performance by BTS, and Goo...