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The teachings of Judaism have not mandated its followers to seek converts for over 2000 years. Jews propagate their religion in the sense that they observe the Torha-command to teach their children the religion and have, in this way, kept the religion alive.
At the beginning of the excerpt in "Night" by Elie Wiesel, Wiesel is in a train car with other Jews being transported to the Auschwitz concentration camp.
The same way that all other Jews observe Pesach (Passover).
Black Jews observe Shabbat no differently than any other Jew.
All countries which guarantee freedom of religion allow Jews to practice their faith. Throughout Jewish history, Jews who lived in countries where freedom of religion was denied, practiced Judaism in fear or in secret. Only one country has Judaism as the majority, with other faiths respected. That one small country is Israel.
Elie Wiesel helped the Jews, by making a Humanitarian foundation for the effect of the Holocaust and its impression on those who were effect. He not only helps the Jews but others who were abused just the same and suffered.
Religion did, Jews were persecuted and blamed for disease and other unpleasant things. The Jews were, of course, also influenced by the teachings of Judaism.
The religion of Jews is Judaism.
Jews observe what is written in the Torah. Period.
Tortured them Killed them.
Elie Wiesel's difficulties was to see not only his family vanish, but to see 6 million other people that look like him vanish, and to see such brutality and cruelty in the Nazi party towards the Jews.
They don't try to 'convert' anyone. They try to interest them in religion.