Here's a Baltimore Jewish Times story about Russian conductor Vladimir Fedoseyev, the conductor of the prestigious Vienna Symphony Orchestra, allegedly firing all the Jewish musicians in the Moscow Radio Symphony Orchestra in 1977-1978.
One witness says that: "after musicians began applying to leave the country, the Soviet minister of culture summoned the orchestra's conductor, Ghennady Rozhdestvensky, and demanded that he discharge all Jewish musicians from the orchestra. Rozhdestvensky refused to do so and resigned his position as conductor instead."
This story deserves wider coverage.