Yevsektsiya
The stated mission of these sections was the "destruction of traditional Jewish life, the Zionist movement, and Hebrew culture".[5] The Yevsektsiya sought to draw Jewish workers into the revolutionary organisations; chairman Semyon Dimanstein, at the first conference in October 1918, pointed out that, "when the October revolution came, the Jewish workers had remained totally passive … and a large part of them were even against the revolution. The revolution did not reach the Jewish street. Everything remained as before"
https://en.wikipedia.org/wiki/Yevsektsiya