Se·mit·ic /səˈmidik
adjective: Semitic
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relating to or denoting a family of languages that includes Hebrew, Arabic, and Aramaic and certain ancient languages such as Phoenician and Akkadian, constituting the main subgroup of the Afro-Asiatic family.
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relating to the peoples who speak Semitic languages, especially Hebrew and Arabic.
So if you are anti-semitic you are against all of the middle east