But I sort of suspect Eliezer thought Taubes work in general made a good case that dietary scientists had killed millions and that was just the most convenient article he had when looking for cites.

It's not just a matter of singling out that source, but of singling out a claim. Many people complain that these posts are not representative of Taubes's work, that Taubes says little about sugar and lots of about general carbohydrates and fat. But they are representative of Eliezer, who talks only of sugar and not of fat. He makes the specific error of claiming that dietary scientists praised sugar. Going by Chris's quotes, Taubes does not make that error.