All the use of historically Christian terms as part of evil forces in another world, and the denial of life after death (in the traditional non-pantheistic sense), could and should IMHO be easily ignored in a fantasy book.
However, Ms. Malone (the former nun), in effect, is proselytizing for the rejection of Catholicism and Christianity. Her views are aired completely and affirmed by the remaining story.
This is much more blatant than the Christian themes of Narnia. "Christianity was just a big mistake," as Malone's expressed opinion, is a major theme of this stunningly written, imaginative series.
I ask the producers to consider the appropriateness of similar jabs at Mohammedism, Judaism, Hinduism or any other religion. Or to remove the clear acceptance of the Wiccan religion, or of Shamanism.
Pullman is incredibly gifted. His books are just biased, that's all.