Maybe, but I don't think that distinction matters here. Surely you're not contending that it counts as doxing every time someone collects data from multiple public sources?

I've always understood doxing to be PII, which aliases aren't, AFAIK, unless they're connected to a real person. And, to my knowledge, everyone is contending that the names in the blog post are all aliases. And, regarding aliases, I've never understood it to be doxing for someone to say "FakeNameX and FakeNameY appear to be the same user."

So, to me, the thing that makes it not look like doxing is that it simply doesn't meet the basic definition of doxing. It provides no PII.

How low has the bar gotten where doxxing is literally just doing a Google search and a whois lookup about a well-used public website? The hackers of the 90s and aughts would laugh you straight out of the irc server with this comment.

Yes, that is exactly what “doxing” almost always refers to. It’s a very disingenuous response.