Voting your comment up for being a valid point. That said, while that may be the intended use of theocratic, but in context here it seems that the poster intended to mean theocratic in a more general sense. I
Note that given the historical existence of the Papal States, the claim is, even when interpreted in the narrow sense, still wrong.
This also runs into the problem that many governments in the Islamic world did not generally have a theocratic element in this narrow sense. The Ottoman Empire for example did not have clergy members involved in politics (although technically speaking the sultan was officially considered to be the heir of the caliphate, I think.).
So while you've made a good point about the technical meaning of the word, I don't think it saves the poster's remarks.
Note that given the historical existence of the Papal States, the claim is, even when interpreted in the narrow sense, still wrong.
While the donation of Constantine was fraudulent, the donations of Charles the Hammer and Charles the great were real enough, but the church ruled those states under the holy Roman emperor, like a baron under a king - hence arguably not a theocracy. At least that is what they argued, though as the authority of the holy Roman emperor declined, the argument became less credible, and was accordingly condemned.
I wanted to bring attention to two posts from Razib Khan's Discover magazine gene expression blog (some of you may have been readers of the still active original gnxp) on the polemic surrounding Pinker's The Better Angels of Our Nature.
Relative Angels and absolute Demons (and the related But peace does reign! )
I generally agree with some of his arguments, but found this quote especially as summing up some of my own sentiments: