The Society of St. Pius X (SSPX) is an international traditionalist Catholic organization which defines its mission as opposing innovation and modernity within the Catholic Church. 

Although its main focus has always been the preservation of the Latin Mass as a viable form of worship, SSPX has promoted theological and conspiratorial anti-Semitism among its adherents. 

In sermons, writings, Web sites and publications, SSPX representatives have charged contemporary Jews with deicide, have endorsed the Protocols of the Elders of Zion, and have claimed that there is factual basis for the Blood Libel.  One of its bishops has also denied the Holocaust.