I almost cut off my relationship with my mother in 2020 because of her politics and some stupid shit she quoted me from Fox News that was exposed with a five second web search. I really feel your pain.
A friend gave me the wisdom that “it’s harder to open a door than to shut one.” That saved us. I implemented a “no politics” rule with my mom and we’ve been good ever since. She still (accidentally, I think) makes off-hand remarks that are silly, but we stick to the rule and we’re much better off. I can’t save her from her shitty views and it’s best that I not try.