The document Hillman has crafted here is a polemic against the Church. Although it provides some contours to Greco-Roman religion, it is more than a shade simplistic, greatly diminished for lack of a bibliography.
Hillman advances a plausible enough thesis that the Church endeavored to extirpate traditional cultic practices by attacking the cultic pillars, essentially the role of women in these practices, sexuality, and the role of mind-altering plants and medicines, where women also played an important role. It's an old argument which can be deduced as in essence correct. Hillman's original contribution is that defiling boys by clergy played a central role in this project given Hellenistic prohibitions against "violated youth" in participating in traditional cultic practices. Clergy ritual rape not only excluded individuals (boys) from their participation but also inculcated an aversion to female sexuality.
Aside from a peppering of quotations from Tertullian, Ignatius, and Clement of Alexandria, there are zero citations. Hillman is an avowed Hellenophile who brandishes his evangelical message in a fashion that conveniently overlooks pre-Christian pederastic practices. Failure to even mention some of the contradictions of Hellenism makes Hillman's diatribe palatable only for those already with an axe to grind against Christianity. Though this reader did find his discussion on oracles and related Hellenistic cult architecture informative, the work is on par with the one-dimensional stuff that other proselytizers produce for uncritical and unlearned audiences.