I recently caught my chud family member watching some dumb youtube video about “experts lying about COVID” (yes, chuds are still malding), and like, what’s the fucking point anymore?
You can be as gracious, understanding and in good faith as possible, but people will believe whatever nonsense some idiot influencer says is the truth. It makes me so mad, and unable to argue with these people, because their irrationality makes me irrational. Fuck.
Anyway, how are y’all doing? 
Sometimes you gotta connect with someone on a personal and cultural level before they’ll listen to you. People believe what their group believes, because 1) it helps them fit in, and 2) they trust the collective wisdom and values of their group more than they trust their own limited personal judgment and life experience. If you threaten the beliefs that help them get along with their peers, they’re gonna shut down to protect themselves before you even get to the logical part of their brain. The best way to get past this is to connect with them first over shared values and life experiences, because it kinda legitimizes what you’re saying and gives them permission to think about it.
Just my 2 cents, not aimed at OP or anyone in particular