Surely Feaver can't believe that the administration should commit itself to a course of war with Iran if it does not, in fact, desire one? And this is the problem with the "Iran hawk" position: there is no credible way to threaten to use military force against Iran unless you are really willing to use military force against Iran.
And in this way, at least, the Iran "dove" position is intellectually coherent. They have concluded that a war with Iran is costlier than a nuclear Iran, and so can structure their policy accordingly. The hawks either believe that war is the lesser evil, or they have a naive faith that they can structure a too-clever-by-half means to convince Iran we're carrying a big stick when they actually have no intention of swinging it.