My 80 year old father-in-law who lives has been an avid watcher of FOX for however long it has been around. Last month, my husband and I convinced him to try OAN. He likes it 100% more than FOX. He likes “just the news” without all the commentary and spin.
My 96-year-old mother in NYS is addicted to Fox News. She’ll be spending winter months with us in TN, so we’ll convert her. It won’t be hard. Just like your FIL, she recognizes the truth when it’s shown to her.