It's ok. if you hadn't read or seen the movie, and don't know what it's about, I can tell you it's not about rape, or lust or passion, (even though some of that is in it) or glamourising it.
It's about the surviving the American Civil war, from the POV of the Southerners.
Windies is just a name for people who have seen Gone With the Wind a number of times or read the book or both and like to discuss it. If you can sit through a 4 hour movie or read a 1037 book then thats more than what most people can manage.
There are other movies and books you COULD discuss, like Lord of the Rings (also very long, in both book and movie) or the Chronicles of Narnia,,,,but this thread is about Gone with the Wind.
As for being a christian, I believe Vivien Leigh (the actress who played Scarlett O'Hara) was a Catholic, but a very lapsed Catholic. Near the end of her life she regretted a lot of the things she did when younger (and manic!) but she sort of learned through it and was at peace with herself, and others when she died. If you ever read a biography of hers there was. lot of conflict in her life and she battled many demons.
I find the love triangle very sad and actually I wondered what I would do if I was in Scarlett's position. Could she have helped falling in love with Ashley who was kind to her, and seemed to be the perfect gentleman? Was she wrong for having feelings for him? She didn't want Rhett at all when she first met him. She actively pushed him away, and couldn't see that he did love her in his own way.
Anyway...the scene where she's praying and has an epiphany that she ought to tell Ashley that she loves him is quite funny in that once she tells him, its all ruined. He's going to marry Melanie instead and her declaration won't change his mind. Melanie was a Christian in every sense of the word.