"In answer to your inquiry :
...In the U.S.S.R. anti-semitism is punishable with the utmost severity of the law as a phenomenon deeply hostile to the Soviet system. Under U.S.S.R. law active anti-semites are liable to the death penalty.
January 12, 1931"
First published in the newspaper Pravda, No. 329, November 30, 1936
Not for speech, mind you, not here...yet.