I feel there is very little we can do individually to change people's minds or turn them away from fascism, or even to get them to stop turning their own brains into soup, but you can still show them there are consequences to their actions.
Telling my own friends / relations what I think of them and cutting ties with them has done nothing to bring them back in line with normal human values, but at least I am not burdened with the guilt of my association, and maybe one day enough people will cut them off that the loneliness gets to them and they begin to re-evaluate their lives.
It is literally the least I can do. Any sadness I felt was heartbreak that they could be so shitty to begin with.
Every decade folks have moved into or out of my life. I think going through our twenties everyone is friendly; you socialize with lots of peers and still try to make good impressions with older people to maintain good social standing. Once you hit thirties you begin filtering out folks who don't align with your morals and values. You know who you can and can't trust and have less time to be patient with others ignorance. I'm not in my forties yet but understand I'll probably have boomer outbursts one day and the kids will make fun of me.