100% in agreement with most of this article. Homeopathy is idiocy. Please don't think that the majority of people with leftist tendencies buy into this crap (please tell me we don't, do we? haha).
That being said, the author makes a bold claim when he says that creationism and climate change denial are harmless on the same level as this. First of all, its a matter of scale. What percentage of Americans strongly believe in the efficacy of homeopathic remedies? Comparatively much fewer, I would hope.
Far more importantly is the pervasiveness of the errant beliefs. There are the unfortunate wacks who end up teaching their children that this stuff works, but there is no massive organized movement to push homeopathic remedies into our educational system as if it were on equal footing to true medicine: to "teach the debate" (chortle) as it were. As a wise man said, "they have a name for when homeopathic medicine works. We call it 'Medicine'. " Likewise, there is no massive privately funded misinformation movement trying to teach the validity of homeopathic remedies, such as there is with the corporate movement to legitimize climate change denial.
Finally, a foolish belief in the efficacy of homeopathy does not exert a backwards pressure on research and funding of true medicine. The same cannot be said of AGW denial or the push for public teaching of creationism as science. In summary, the difference lies in the fact that, while the belief itself is perhaps equally harmless, the scale of concerted effort put forth in AGW denial and creationism compared to homeopathy makes the latter a much more benign stupidity.