Final answer:
There have been several conspiracy theories and propaganda about Jews throughout history, including the Protocols of the Elders of Zion, Nazi propaganda in Germany, and the anti-Semitism encouraged by the Tsarist autocracy in Russia.
Step-by-step explanation:
Throughout history, there have been various conspiracy theories and propaganda about Jews. One example is the Protocols of the Elders of Zion, a document that claimed to be the minutes from a meeting of international Jewish leaders. This document was used to justify anti-Semitic restrictions in the Russian Empire. Another example is the anti-Jewish propaganda spread by the Nazis in Germany, where Jews were portrayed as an existential threat to German society. Additionally, the Tsarist autocracy in Russia encouraged anti-Semitism, blaming Jews for political, economic, and social problems.