A small group showed up to show solidarity.
Then, as the Brooklyn College Student Union Instagram shows, people started chanting for an Intifada - effectively calling for people to kill Jews in Israel, as the two previous intifadas had done. The leader of the chants is holding the sign shown above that says "Standing with Muslims against Islamophobia and Racism" so it was certainly at the same gathering.
Yes, a rally to support Muslims against violence ended up becoming a public call to kill Jews.
In Brooklyn.
The chanters don't exactly sound like white supremacists.
(I believe, but I'm not sure, that the chanter was "chrismjia" based on the sign, the bag and the jeans which match the chanter.)
(h/t Melissa)
UPDATE: I originally posted that this was a rally from the YPA Brooklyn College on Thursday instead of the socialists' rally on Tuesday. I regret the error.