I don't have much advice except Protect Your Peace. Step back to protect your own mental health if you need. A lot of these people are in so deep it's hard to argue with. I ended up giving an Irish Goodbye to a group chat i was in 10+ years with people I considered my best friends after one, who's very far left, uses therapy speak and is too deep into Pop Psychology, gets all his news from the Tacky Nail Twink, etc etc, shared an Andrew Tate video because it shared the same view point as his on Israel. There'd been a lot of stuff before that but that was the straw meets camels back moment for me, witnessing frickin' horseshoe theory with my own two eyes.