A woman with a strong Christian faith is miles apart from a woman with feminist tendencies. In this case there is a woman who is abandoning her Christianity (if she ever really was a Christian) in favor of feminism. Feminist women are predictable because they're all the same:
When they'e young they go to bed with lots of guys because they look good and they like the dopamine rush of being wanted.
When they get a little older, they all pride themselves on being strong, independent women.
They will probably get married as they find some sucker to provide for them even after they wasted their best years on their whorish ways.
She will inevitably despise this guy that marries her, and she'll immediately be on the lookout to level up.
It's amazing how almost all feminist women follow this basic pattern. It's like they're not even human anymore. It's pretty tough to keep them from jumping ship. But here's my best advice when dealing with a feminist wife/girlfriend.
1. Always show her that you are a high tier alpha man. Get in good shape, make good money, etc.
2. Let it be understood that if she leaves you, that you'll be just fine. You'll have plenty of women lined up in about a half a day.
3. Don't be a good boy around a feminist. You'll never get anywhere.
4. Do NOT get suckered into carrying her purse, buying her tampons, or anything remotely like that. These should always be seen as tests. If you start giving in and failing these tests, she's going to see you as low tier, and it'll make her want to jump ship immediately.
If you have the rare gem of a real Christian women, then you have truly been blessed by God. They're so much more interesting and nuanced. It's harder to give advice for dealing with them since every one of them is different. I do think that all women are susceptible to feminism, so the above advise is still applicable but you can dial it back about 80%. Here's what's worked well for me and my strong Christian wife for almost 30 years:
1. Keep her laughing. Don't let her get bored.
2. Keep her sexually satisfied.
3. Keep earning her respect.
(and FWIW I've never bought tampons for her.)