No, it isn't.
Many of Holder's critics appear to have forgotten that the Bush administration used civilian courts to put away dozens of terrorists, including "shoe bomber" Richard Reid; al-Qaeda agent Jose Padilla; "American Taliban" John Walker Lindh; the Lackawanna Six; and Zacarias Moussaoui, who was prosecuted for the same conspiracy for which Mohammed is likely to be charged. Many of these terrorists are locked in a supermax prison in Colorado, never to be seen again.
What the authors fail to state is that all of these were either US citizens or were arrested by US criminal authorities. The point here is that all of these were Mirandized. I keep going back to this point because courts have required over and over and over that a suspect be Mirandized or there is no trial. How many have gone free on this point alone?
Some say it is wrong to give Mohammed trial rights ordinarily conferred on Americans, but a benefit of civilian trials over commissions is that they make it harder for defendants to complain about kangaroo courts or victor's justice.
They will make these complaints anyway....especially after they are acquitted because of a technicality (There is that pesky Miranda thing again), then remain in custory as the AG has stated.
There are so many other arguments to make, but time and space prevent me from doing so.