The head of the Media Responsibility Institute in Erlangen, Sabine Schiffer, and researcher Constantin Wagner, who also define Islamophobia as anti-Muslim racism, outline additional similarities and differences between Islamophobia and antisemitism. They point out the existence of equivalent notions such as "Judaisation/Islamisation", and metaphors such as "a state within a state" are used in relation to both Jews and Muslims. In addition, both discourses make use of, among other rhetorical instruments, "religious imperatives" supposedly "proven" by religious sources, and conspiracy theories.