I don't believe most people that go down this road are going to listen to any logic. Trying to combat it by telling them they are wrong and why just makes them dig their heels in even more.
You can ask empathetic questions and try to learn what brought her here. A lot of people start a normal amount of right wing, and then the internet feeds them more and more far right stuff and this happens. There's a sense of community and belonging to these spaces.
If you care about her and want to continue the relationship, ask that neither of you bring up politics and just talk about your lives, see if she has anything good going on, and encourage local activities if possible.
Channel 5 did a movie called Dear Kelly about a guy who went full conspiracy after losing his house and I believe custody of his kids. In the movie they talk about past trauma leading to this obsession.
Try to be compassionate if you can. It can be very difficult depending on the person and the existing relationship but I think it's the only real way forward. Alternatively I also think if they are abusive or too over the top just cutting ties with them works too.
It can be very frustrating, but I hope it works out. Good luck!
It's sad to see so much hate. I wasn't reading anything about the patch when it came out and I was digging it, then I checked out reddit and it was all negative. I think at least some of it is just from the nerf patch numbers and not how it actually plays. GGG has a lot of credit with me based on how they've run poe1 so that might just be my own bias. They'll turn it around though, and I'm happy to play through the early access ups and downs.