No one who looks at ALL the facts could possibly believe that either al Qaeda or Iraq were behind the attacks.
But it's not worth arguing over, since the ONLY argument such people have is that it cannot be proven that it is IMPOSSIBLE for al Qaeda or Iraq to have done it. And if you can't prove it's IMPOSSIBLE, then they are free to believe it is true - no matter how ridiculous the belief is.
Ed
Do you have any evidence that any of the mailpieces were mailed after September 8, 2001?