Nonsense. The explanation is easy: the anthrax attacks were originated in Pakistan, and we didn't want to nuke an ally off the planet for hitting us with a WMD attack.
Pakistan cooperated in the War On Terror, thus giving them some limited immunity from the original 2001 behavior of rogues on their soil.
So, President Bush attacked Afghanistan because he didn't want to attack Pakistan? And everyone in the government just went along with it?
And there was no conspiracy involved? Hmmm.
That another interesting belief totally unsupported by any facts while contradicting all known facts.