A Jew who converted, who simulated, was, at least in some periods, safe. Hitler in the beginning did not want to kill all the Jews but he wanted us to have a Germany free of Jews. If America had allowed Jews to come in, the British had accepted Jews from Palestine, they were safe.
Elie Wiesel"Am I my brother's keeper?" There you have the whole Biblical understanding that you are your brother's keeper. You also have a whole other understanding in which you are not your brother's keeper. And I've heard some extremely bright people take this position.
Elie Wiesel