Banned Books week

The last week of September each year is given over to Banned Books Week by celebrating the freedom to read. The American Library Association reports:

The 10 most challenged books of 2007 reflect a range of themes, and are:

1. And Tango Makes Three, by Justin Richardson/Peter Parnell
   Reasons: Anti-Ethnic, Sexism, Homosexuality, Anti-Family, Religious Viewpoint, Unsuited to Age Group
2. The Chocolate War, by Robert Cormier
   Reasons: Sexually Explicit, Offensive Language, Violence
3. Olive’s Ocean, by Kevin Henkes
   Reasons: Sexually Explicit and Offensive Language
4. The Golden Compass, by Philip Pullman
   Reasons: Religious Viewpoint
5. The Adventures of Huckleberry Finn, by Mark Twain
   Reasons: Racism
6. The Color Purple, by Alice Walker
   Reasons: Homosexuality, Sexually Explicit, Offensive Language,
7. TTYL, by Lauren Myracle
   Reasons: Sexually Explicit, Offensive Language, Unsuited to Age Group
8. I Know Why the Caged Bird Sings, by Maya Angelou
   Reasons: Sexually Explicit
9. It’s Perfectly Normal, by Robie Harris
   Reasons: Sex Education, Sexually Explicit
10. The Perks of Being A Wallflower, by Stephen Chbosky
    Reasons: Homosexuality, Sexually Explicit, Offensive Language, Unsuited to Age Group

I can see that some people might think that Pullman's "The Golden Compass" is anti-religion but what is the "religious viewpoint" of "And Tango Makes Three"?