noun
anti-Semite
A person who holds prejudice against or discriminates against Jewish people.
彼は反ユダヤ主義者の発言を非難した。
He condemned the anti-Semite's remarks.
Refers to anti-Semitism as an ideology or movement, while 反ユダヤ主義者 refers to a person who holds such views.
Compound of 反 (anti-), ユダヤ (Judea/Jewish), 主義 (doctrine/ism), and 者 (person).