It seems like there's quite an active movement of Jewish groups in New York who are pro-Palestine.
One such viral movement I've seen online is this Neturei Karta (an ultra-Orthodox sect based in Brooklyn). I don't know if I'd ever come across these live in New York City. I might have briefly brushed by them without knowing it.
Google AI: Neturei Karta is an ultra-Orthodox, anti-Zionist Jewish sect formed in Jerusalem in 1938. They actively campaign for the complete dismantling of the State of Israel, believing Jewish sovereignty over the land is forbidden by the Torah prior to the arrival of the Messiah. Their Messianic Rule = without human intervention. They adhere to highly traditional, insular, and socially conservative lifestyles. Neturei Karta is considered a radical fringe movement that does not represent mainstream Judaism. They often carry signs and Palestinian flags to project the image of "Jews against Israel".
Other similar Jewish groups:
Satmar Hasidim, Jewish Voice for Peace (JVP) NYC, Jews for Racial and Economic Justice (JFREJ, a large progressive Jewish grassroots org), Malkhut in Western Queens (intergenerational Jewish spiritual community serving Western Queens, including Long Island City, Astoria, Jackson Heights, and Sunnyside. Led by Rabbi Rachel Goldenberg).
I've also learned that the most popular Brooklyn group, the Chabad-Lubavitch (popularized by their 7th and final Rebbe, Rebbe, Rabbi Menachem Mendel Schneerson (1902–1994) who was even considered by some followers as the Messiah), is against Palestine. This group love to do outreach (Kiruv) looking for Jews on the streets, which most other conservative Jews despised as they prefer isolation like the Amish. Chabad is considered right-wing politically.