This is so vile and very troubling.
Because some of the participants don't seem to be so "radical" based on their looks -
Something is wrong in the way those kids are being raised.
To me this is much worse than screaming or even throwing things at a soldier walking through Meah Shearim (not that doing so is okay) simply because the soldier at least can hit back.
Harassing two girls walking down the street is something that most civilized people realize is something beyond the pale of decency.