Ask her what her relationship with God is and what is it that she gets out of what she is now doing. Is it out of fear that without this she will be worse off?, maybe making up for sins of the past?, out of a “calling” or some deep personal gratification?, maybe it’s is something she’s not fully explored? Make her uncomfortable and justify her stance and only when she’s able to provide a logical response can you then tell her calmly that shit isn’t for you. Without a common ground and understanding, cutting through to brain rot is a difficult and pretty impossible task because it’s usually not logical, so self preservation for yourself is best and keeping your distance until they answer to their own selves and come out from the fog.

I had a friend who went full Jesus, only to be secretly chasing a girl in the group, and then backed away very quickly once she cheated on him and he realised that people are people and religion has little to do with it. It was a bit of a loss for a while while they went on their high horse, but once they unplugged from the rhetoric the friend I knew was still there, and the rest of us were waiting. Tbh the “non-believers” in the friend group were more akin to actioning the prodigal son parable and more kind than any of the so called religious friends at end of this.