You're right, Pete, I should have read your most recent posts, and then I would have understood what you were getting at earlier. I didn't interpret Tom's initial post the same way you did. Rather than see it as something along the lines of "Hey, here's an excellent argument indicating that The Hill has a liberal bias. I found it on Conservapedia, so here's the link," I saw it as "Check out this article making a comprehensive case for The Hill having a liberal bias. Here's just one example of what they have to say!" I can't prove that was what he meant, but it does seem like that was the case from how he responded to us - not by directing our attention towards the specific argument, but by defending Conservapedia and arguing that its conservative stance doesn't make it wrong or unreliable. Rama seemed to also have interpreted the post this way, which would explain why he chose to debunk every argument the article provided, not just the one Tom screenshotted, as well as why your back-and-forth with him went on as long as it did - he was talking about the article as a whole, while you were talking about one specific claim.
I fully agree with you that criticizing the original source of an argument when the merits of the argument are what's being discussed isn't very productive. But if the source itself essentially is the argument, and is just linked in its entirety to argue a certain position, then I think it's entirely fair to point and laugh when the source is a meme on the level of Conservapedia. Not the most productive thing to say, but still something that's entirely relevant. If you don't agree with me on that, then I think we'll just have to agree to disagree, because I can't see myself changing my opinion.