Assuming she is only "slowly turning left" and not 100% in the bubble (which is the case if you can reach her as a friend), you can slow down or put the brakes on her insanity by casually dropping truth bombs that shine a light on their logical fallacies. Things that don't really "attack" her beliefs, but responses that make you sound like the reasonable one. An outsider simply befuddled at such an extreme take from her. "Huh, if A is true then how come B?" There's a few good examples here but it's probably safest to avoid the jew angle for now.

You're not going to force someone to change their opinions but asking the right rhetorical questions and pointing out their fallacy through analogies can cause them to think a bit about their opinions later, instead of ignoring the inevitable cognitive dissonance with reality. If she ends up as someone who "hates both sides and just wants people to love one another" that's still better than the alternative.

This is also assuming she's not a low IQ bimbo who wears ideology to get along with her peers. In that case no reasoning has taken place and she'll always just adopt the beliefs of whomever has power and influence over her.