The correct answer is:
When Adolf Hitler became the leader in Germany, the Nazis established many laws against the Jewish people. Among those laws, were:
The establishment of the Racial Hygiene Department to star the ethnic cleansing.
Public burning of Jewish books.
Jews were excluded from military service.
Law for the Protection of German Blood and Honor.
These policies served to <em>weaken the Jewish population</em> in Germany because of many reasons. The establishment of the Racial Hygiene Department to star the ethnic cleansing was the cause for sending Jews to the concentration camps where the Nazis killed these people in the gas chambers. The Law for the Protection of German Blood and Honor prohibited Germans to marry Jews. But it was basically the Racial Hygiene Department that considerably diminished the Jewish population in that country.
