I didn't suggest that he meant that, I suggested that what you said didn't do enough to exclude it from the class of reasonable interpretations of what he might have meant.

Suppose someone says to me, like you did, "there's this guy Hitchens, he said the following: "Who designed the Designer? Don’t you run the risk… of asking 'Well, where does that come from? And where does that come from?' and running into an infinite regress?'". The very first thing that comes to mind, and which came to my mind even before I'd read the next sentence, is "oh, I've used that argument myself, when some religious person was telling me 'but the Big Bang had to come from somewhere', that must be what Hitchens meant". That's the default interpretation that will come to the mind of anyone who's willing to give Hitchens the slightest benefit of doubt.

Yes, if people click on the links you provided they will see that the interpretation is wrong, but most people aren't going to do that. And people shouldn't need to click on a link to see that the most plausible-seeming interpretation of what they've read is, in fact, incorrect. If it's important for conveying your message correctly, then you should state it outright. If you give an example about a person's non-scholarship and people start saying "oh, but that doesn't need to be an example of non-scholarship", then it's a much worse example than one that doesn't prompt that response.