My point was that just because Eqypt was conquered by Arab Muslim armies did not change the ethic attributes of most Egyptians that much, and therefore most Egyptians and most Coptic Christians will be similarly related to ancient Egyptians but the Coptic Christians not more so.
I agree....though many people from these armies settled in Egypt and progeny. The Copts were less likely to be descended from these Arab armies and thus the most likely (even more likely that the Jews) to resemble Ancient Egyptians both in appearance and genetically.