If you believe that, you really need to go back and read more about the case. Compared to the evidence that the anthrax came from an Islamic source, the so-called "evidence" that it came from a domestic right-winger is of zero value.
To get a start, I suggest you read the series of newsmax articles to which I have been providing links on another thread. Here's a link to one of them (which will allow you to navigate to the others): FBI Overlooks Iraq's Connection to Anthrax Attacks .