The last Egyptian: a story on the banks of the Nile

"Our friend approached him, he said, looking at him closely:" You are a Coptic, right? "The man laughed, and the English spoke automatically, as if he was speaking in his mother tongue saying: Then he returned to clarify: "I am not a Christian, but if you mean my Coptic that I am an Egyptian and not an Arab, then you are really right!" Convincing everyone of the validity of his claim? How did he t...