Apparently, this was a performance by a dance troupe, under direct supervision by the instructor. It’s funny how that information has escaped so many of the news stories.
It’s a public “recital” for the troupe, celebrating July 4th, under adult supervision. Put in that context, the timing is less problematic for me.
What about the driver or owner of the vehicle? The assailant was the passenger, the driver must be held accountable as well.