I imagine they were all busy taking selfies and movies of the “event” with their “smart” phones. “Snowflakes” again.
They were probably cheering them on. She was lucky that the bystanders thought slow and did not think about joining the attackers.
I wouldn't be surprised if those pictures and videos haven't been uploaded to social media. The authorities, if they wanted to, could probably find those postings and identify the perps and witnesses.