Wow - where are you finding any "glee" in this article? The only hint of any kind of emotion I can find are very tame reminders of instances of irrational support for the drug, and how important it is to remain objective about things like this. Of course, that's frustration - any glee, if present, would come in the places where the author talks about the evidence to the contrary, but the writing in those places seems very straight forward. Ironically, I think you may be injecting emotion that isn't there due to the intrinsic sociopolitical nature of the story. Emotion the author may indeed have! But it's not in the article, as far as I can tell (again, I'm talking about petty glee, not frustration).

And even giving you the benefit of the doubt - that there is something you could at least describe as happiness - it would make sense, since strong evidence either way would be cause for happiness. If the author is happy, it could easily be because something good happened: Evidence against something dangerous (irrational support for a drug). I would hope they would also be even more happy if the opposite, even-better case happened (strong evidence that it works), and I totally understand being skeptical that they would indeed express that attitude, but it's irrelevant since the article is about the opposite case.