And, the people on the train? What did they do? I mean, apart from taking video?
The great failing, here, is that people no longer feel any need to intervene or assist. And, the feral children continue their assault on civilization at large.
Leave a few of them in pools of their own blood...the others will begin to get the message.
It may also be true that people avoid intervention for fear of being sued by the perpetrator or arrested/prosecuted by woke: police, AGs and district attorneys.
There would be immediate charges if ANYONE so much as touched those juvenile thugs or tried to stop them - there would be screams of racism along with child abuse.
Alvin Bragg himself would have taken a few minutes of focus off of Trump to go after anyone who tried to stop this assault.