I sort of agree. The only examples in the article are about Christianity, Mormonism, and Judaism, which isn't terribly representative of the world's religions. I'm also pretty sure Wiccans and Buddhists and Hindus might object to the idea that their religion is inherently authoritarian.
That said, there is a lot of truth to this article. Many religions are authoritarian in the sense of "strict obedience to authority" - there are tenets of the faith that one must believe and there is a priestly class that one must obey. Just about any organized religion operates that way. Additionally, organized religion by its very structure is an impediment to social change. The religion's founder got everything right and believers aspire to live their lives (and make others live their lives) according to whatever the founder set forth. Certainly, this is true of Christianity and Islam. Of course, believers do assimilate new social norms (eventually), but these new ideas do not rest easy with the old ones, as exemplified by the fundamentalist–modernist controversy in Christianity and similar conflicts within other religions.