Arab: a member of a Semitic people, originally from the Arabian peninsula and neighboring territories, inhabiting much of the Middle East and North Africa.
Semetic: 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.
The name Semite comes from Shem, the eldest of the three sons of Noah. In the Greek and Latin versions of the Bible, Shem becomes Sem, since neither Greek nor Latin has any way of representing the initial sound of the Hebrew name.
Now who is Shem? He's one of Noah's three sons. And Noah had ONE wife (according to semetic scholars). So if Noah had one wife and his wife had one husband, how in the **** was Ham the only BLACK son?
Semites, Arabs or whatever you wanna call them are Africans that left and mingled with the descendants of Neanderthals.
Also... Africans are not one ethnic group and are genetically and phenotypically diverse.