I'm responding to the exact statement made, so I don't know what you're talking about regarding a least charitable interpretation.
Notice, it's a very common occurrence. People note that something posted is inaccurate, in their own personal interpretation. It's usually not directed at them, but there's a need to correct the posted because of their personal interpretation (re: xkcd Duty Calls). This is not to say, I've never been guilty of this (maybe this post is a great example). Sometimes I want to argue. Sometimes I want to explore my own beliefs, given another person's position, and get it recorded somewhere. That being said, I can recognize that it's not constructive for the conversation at hand and I'm trying to do better, while still growing my own understanding.