Zionist conspiracy theories
Many people in fringe groups, such as Neo-Nazi parties and Hamas claim that the true aim of Zionism is global domination; they call this the Zionist conspiracy and use this to support anti-Semitism. This position has historically been associated with Fascism and Nazism.
In addition, believers in Holocaust revisionism often claim that this "Zionist conspiracy" is responsible for the exaggeration or wholesale fabrication of the events of the Holocaust. Most academics also agree that there is no reliable evidence for any such conspiracy, and an overwhelming amount of historical evidence that supports the mainstream historical view of the Holocaust.
One of the most damaging anti-Semitic tractates published is the infamous Russian literary hoax, The Protocols of the Elders of Zion, a key part of many anti-Semitic conspiracy theories. This subject has its own entry.
Other Conspiracy Theories
Because Karl Marx was of ethnic Jewish origin, this has led some to postulate that communism is a Jewish conspiracy. This is despite the fact that Karl Marx was born into a Lutheran family and was raised a Lutheran until becoming an atheist as a young man. Marx himself harbored anti-Semitic views, having published On the Jewish Question, in which he writes "What is the worldly cult of the Jew? Huckstering. What is his worldly God? Money.", and claims "The social emancipation of the Jew is the emancipation of society from Judaism." [1]