I am too because it seems one consistent "fact" of his profile was that he was not very fluent in Arabic. In fact, I think he said that himself in one of his own e-mails that was released in the press.
Berg's email:
"Another thing that's tough for me is the language - in Bantu languages the accents are easier to pick up and there are more vowels. Arab is a very intricate language with very fine accents and tons of consonants. So as much as I know the right words and can understand some of them being spoken, I can't say them worth a damn to the fellow who doesn't understand English (about 95% of the people I meet)."
Yes. Now my friend does NOT know Arabic, so that would lead me to believe that to him, he sounded fluent. Also, with all of the different dialects, maybe he knew some better than others. I still think he stuck out like a sore thumb!