The shooter had his ex wife read various YouTube comments out-loud into his iPhone from a playlist he found from some anonymous nobody weeks before. It took hours because the gun made her 'nervous. He didn't want nervous. He wanted a reminder of how much he hated people to play through his headphones as he shot the nobodies in the crowd who looked up to these celebrities. He shot her after she read user generated comments about an old ELO song he once liked before being targeted.