Did you miss the part where a young, apparently unarmed woman actually went to the victim and pulled him away from the criminals? She didn’t go in fighting, she just got him out of their looting of the car.
Whoopie dingbats, he recorded. You know what I want if someone’s beating me up? Police and pronto! He can record after calling. The thugs didn’t seem to care at all about anyone else other than their victim.
Don't expect rationality from teenage thugs gathered in numbers.
Their actions now do not necessarily have any relationship to what they will be doing in 30 seconds.
These youngsters were in Lord of the Flies mode.