Basically, the author of the article is just totally ignorant of the facts. He uses people who are equally ignorant of the facts to support his arguments.
He argues about silica without knowing the facts.
He evidently still believes al Qaeda was behind the attacks:
"It is interesting to note that the second more lethal anthrax letters were likely mailed between Oct. 6 and Oct. 9, 2001. The coalition attack on Afghanistan began Oct. 7, 2001.
Could the phrase "We have this anthrax" have referred to the high potency anthrax in the second mailing and meant, not only to instill panic, but also as a mutually assured destruction-type threat to limit or prevent effective action against Taliban and al-Qaida targets in Afghanistan?"
Anyone who still thinks al Qaeda could have been behind the attacks is someone who has been spending the past eight years with his head stuck in the ground.
It was Saddam.