Study: Young Jews are moving to polar ends — secularism and Orthodoxy By contrast, the number of Jews identifying as Reform and Conservative — the two largest branches of Jewish denominational life — has remained flat. In this Wednesday, Oct. 7, 2020 file photo, members of the Jewish Orthodox community gather on a street corner in the Borough Park neighborhood in Brooklyn, New York. A comprehensive new survey of Jewish Americans finds them increasingly worried about antisemitism and sharply divided about the importance of religious observance in their lives. The wide-ranging survey, released on Tuesday, May 11, 2021, was conducted by the Pew Research Center. (AP Photo/John Minchillo)