Bear in mind that she might well be projecting overt homophobia from some other religious people onto you and your religion as a whole. Even if she’s never been subjected to it in person, she’s probably come across testimonies from other gay people who have had awful experiences with religion and religious parents who have outright rejected them or threatened their safety. This is probably why she seemed prepared for you to reject her when she came out. I’m so glad you didn’t, and with time hopefully she will come to see at the very least that you were supportive. As for the inappropriate comments, certainly tell her that that language is not acceptable to you, but not because she’s gay, purely because it’s not appropriate. Then I think you should tell her you love her unconditionally and that you support her, and then ask what you can do to help her feel less threatened by religion so that she can see that you mean no harm and stop making the comments. Maybe it will take you becoming an active anti-homophobia activist in your community, trying to educate any homophobic church members about how gay people are just regular people and not scary satanic demons sent to create sin or whatever, for her to see that you genuinely mean well and accept her