I do see a difference, and the piece I quoted seems to me to be the latter: redefinition.
I say that, in part, because substituting those meanings changes the perceived message of the piece. If the rest of the essay reasonably supported that reading, I might well agree that this was interpretation, analysis, or even clarification. However, it seems as though the original comment is working backward from pg's identity to decide what opinions it's possible for him to have, in the commenter's view, and then covering the message of the essay (whatever you think of it) with one of the commenter's pg-possible opinions.
Personally, I'd prefer that commenters of this view argue against the essay directly, since I think there are a lot of things to say in that regard.