Removing access to the sources giving them their opinions appears to be pretty effective at drastically reducing their focus on hating things and getting riled up. This was explored in The Brainwashing of my Dad documentary.
I was able to do this with my own mother, who only watched right-wing news from clips on YouTube. When she wasn't at her computer at an appointment, I installed a browser add-on called Blocktube that let's you selectively block YouTube channels or videos from popping by a list of keywords. I also then subscribed her account to left-wing news sources like pbs and more perfect union.
From that point onward, she was never recommended right-wing news or interviews, and within a few months her views on things noticeably changed, she no longer brought up all the fear-porn from fox, and even finally believed in climate change thanks to PBS Terra.
I was fortunate she didn't watch TV, where blocking a whole station would probably be more noticeable. But for those who have the opportunity to limit parent access to right-wing poison, I can attest to its effectiveness.