The assertion that Abraham was Kushite/Proto-Saharan is to say the very least contentious. All of this is based on the notion that Semites and Hamites intermarried to the point of dissolving distinctions between the two. While there certainly are instances of intermarriage between rulers (Sheba, for instance), the notion that the Jews were as Hamitic as they were Semitic is bordering on silly.
"Hamitic" if by that you mean Negroid, then no, there was the vastness of the desert separating the Afro-Asian peoples from the Negroids
Btw, for us Aryanic peoples we didn't interact with the Afro-Asiatic peoples until 1900 BC with the Hittites moving south-west, the Indo-Iranis moving south-east.