When I first clicked on this thread, I thought that there would be a detailing of blasphemous offenses by the makers of Nativity a la the speciousness of The Last Temptation (Jesus' fantasy of family life with Mary Magdalene), The Ten Commandments (The Egyptian Pharoah perishes along with his forces in the Red Sea, according to scripture -- in the movie, he escapes to his throne, where he is nagged by his wife about letting the Israelites get away), or the ridiculous 1999 NBC miniseries Noah's Ark (which puts the book of Genesis in a shredder and pastes it together in random order, adding an additional survivor of the deluge on a raft, and grafting Noah into the story of Sodom & Gomorrah).
Why were those so offensive to a believer's sensibilities? Because everyone is entitled to his or her own opinion, but not to their own "truth." And "truth" was the word used in this piece, not "opinion."
When someone says they know "the truth" about a Biblical event like the Christ child's birth but can't cite the Bible to back it up, they have no one to blame but themselves for opening themselves up to question. IMHO, what you meant by "being respectful of Catholic theology" is not commenting about dogmatism stated by individual Catholics that is supported by absolutely nothing Scriptural. I will be delighted to issue a full apology for offending you as soon as someone explains why Augustine's account of Jesus' birth nearly four centuries after the fact -- which is the basis of the one of the criticisms of Nativity -- should be accepted as "truth."
You act like the Bible explains itself.
We come to the crux of the issue - the authority of the Church Fathers. You, and most of the other "Reformists." don't accept the Fathers' teaching authority. The Catholics and the Orthodox do.