Tell him this sometime: From the Britannica "Semite, Person speaking one of a group of related languages, presumably derived from a common language, Semitic (see Semitic languages). The term came to include Arabs, Akkadians, Canaanites, some Ethiopians, and Aramaean tribes including Hebrews. Semitic tribes migrated from the Arabian Peninsula, beginning c. 2500 bc, to the Mediterranean coast, Mesopotamia, and the Nile River delta. In Phoenicia, they became seafarers. In Mesopotamia, they blended with the civilization of Sumer. The Hebrews settled at last with other Semites in Palestine."
It seems these days that most of them are anti others in their group and I'd say most drnoes are used against Semites.