What other example of human rights violations does wiesel mention in his speech?

Elie Wiesel talked about the humanity's duty to speak out about all the oppressed, whatever their nationality, race, gender, or social status may be. Besides the Holocaust, he mentioned the South-African Apartheid, Stalinist Russia, Communist regimes of the Warsaw Pact countries, imprisonment and persecution of various political dissidents such as Lech Walesa and Andrei Sakharov. He also mentioned the Palestinian cause. He didn't specifically talk about politics, though; his point is that there are people who are oppressed at every moment, in every corner of the world. By keeping silent, we support the oppression. By remaining neutral, we help the oppressor, and the victims suffer more.