Since Rice was trying very hard to evoke a feeling of menace and deathless wickedness, it seems like a very natural reaction to me. Anyone who imagines the books are supposed to be fun and sexy, for instance, would be missing the point.
Anyway, she didn't just suddenly convert. She was born and raised in an Irish-Catholic family, spent most of her adult life as an atheist, and then returned to the Catholic Church in 1998.
Which is why I don't understand people's surprise.
Yeah her vampires kill people, because that what they do. How can you have vampire that doesn't. By definition isn't that what vampires are.
In my opinion, Anne Rice suffers from the 'too popular' curse, where a writer gets over exposed very quickly, and then it becomes somehow out of literary fashion to like their work. I think that aside from a few duds (Pandora, Violin, Servan of the Bones--yikes) she's one of the best literary authors of this era.
It seems ironic that someone who made her name with tales of vampires should be getting it in the neck for writing about something else.
As for why she converted, I've heard from a church friend (I'm not 100% sure so please don't give me a hard time if it's not right) that she embraced her faith again because of her husband's death. During that period, it was said that she found God's light again. I know she's been writing Christian literature since then, but I don't think there's anything wrong with it.
I think it had sort of the opposite affect. She became incredibly popular after Interview with the Vampire, which was a very decent book. But then you have an author who isn't that great, has stumbled on some fame and fortune, and now has to recreate it when the talent just isn't there. So she makes up for the lack of ability by infusing the remaining books in the series with far too much violence and, for shock value I assure you, rampant homosexuality.
I still don't understand what is so incredibly violent about her books.
I would say they are no more violent than most horror or fantasy fiction.