The working definition of the IHRA[0] is truly awful.

  “Antisemitism is a certain perception of Jews, which may be expressed as hatred toward Jews. Rhetorical and physical manifestations of antisemitism are directed toward Jewish or non-Jewish individuals and/or their property, toward Jewish community institutions and religious facilities.”

The original meaning when the term was coined in the 19th century[1] was that of a racial or ethnic hatred of Jews, as "Semite" is a racial or ethnic category. This is more sensible. It can also be distinguished from anti-Jewishness as a rejection of or hostility toward Judaism as a matter of religious belief, culture, or ethos (which better characterizes historical negative attitudes; the test of this is the acceptance of authentic converts, something the Nazis would never recognize, as their hatred was racial in nature).

[0] https://holocaustremembrance.com/resources/working-definitio...

[1] https://www.etymonline.com/word/anti-Semitism#etymonline_v_1...