Drummond, I don't think there was a whole lot of political parties back in Medieval or even the Renaissance? Plenty of anti-semetism in Shakespeare.
Early 1900s saw the rise again, after a brief withdrawal of laws, (much like black codes here) were dropped. In early 1900s The Protocols of the Elders of Zion made a big hit on the continent, coming out of Russia. Lest we forget the pogroms there, including during the white revolution and with Lenin/Stalin.

Like Hitler, these were open secrets.