Here is yet another excellent article on the baffling question of the origin of the anthrax attack. The troubling and confusing upshot of the article is that there are very good reasons to doubt both a domestic and an international culprit.
The best argument against the ‘no-connection to Al Qaeda’ hypothesis remains the sheer rapidity with which the attacks began. The first known letter was sent only a week after the 9/11 attacks.
On the other hand, those who argue for a connection face numerous inconsistencies, including the very non-Al Qaeda-seeming MO and the many oddities of the letters themselves. Among other things, as the Post article notes, the combination of the Arabic “Allah” and the English “is Great” seems odd. To a non-Muslim “Allah” has an exotic sound to it. But it simply means “God.” According to the Middle Eastern studies prof the Post quotes, you’d expect a Muslim to either say it all in English or all in Arabic.
This really is a mystery.