Symptoms of the disease of anti-Semitism: unreasonable hatred of a certain ethnic group, bouts of rage, violence, lust for murder, and destruction under certain circumstances. Fear of finding in the blood of their ancestors the carrier of the "cursed seed." The hereditary and acquired form of mental illness is considered. Types of anti-Semitism: religious, racist, state, scientific, philosophical, antique, nationalistic, modern. Despite the different types of this disease, they all have the same root and are directed against one nation of our species, Homo sapiens, the Jews.