David Waltz is trying to make something of Prof. Hodge's comments on Roman Catholicism (link to Waltz's post). It is worth noting that Waltz has chosen to selectively present one side of Hodge's coin. The other side is that Hodge viewed Rome as both apostate and antichristian (link to example of such teaching) and also as antichrist and a synagogue of Satan (link to example of such teaching) to which we may add the mystery of iniquity and the man of sin (link to example of such teaching).
Waltz does not explain his motivations for choosing to highlight only part of what Hodge taught, and for doing so in a way that grossly exaggerates the differences between Hodge and some of my friends at Triablogue. Yes, my friends and I may well agree with Thornwell and others that Hodge (no doubt due to the softness of his heart) conceded too much to Rome in places such as those Waltz highlights, but the difference between Hodge and us is a lot smaller than Waltz's article would suggest to the unwary reader.