Anti-Semite: a person who is hostile to or prejudiced against Jews and Arabs.
"Antisemitismus" was adopted by Jew-haters in Germany specifically as more "racialist" way of saying Judenhass (Jew-hate), because they saw racism as more scientific than religious bigotry. It's still the same old Jew-hate. Notably, neither the Nazis nor other antisemites particularly care about Arabs.