I totally understand, OP. My dad's like your's: Trump is the President we need, Obama was the worst, Reagan was the best President, taxes are everything, liberal and Democrats want to destroy America, Black Lives Matter wants to kill cops, etc. He's also transphobic and homophobic, always rolling his eyes at inclusiveness in movies and shows, and I heard him say a few days ago that it's a man-run world and that's just how the world is, so he has that attitude too
And it's definitely rubbing off on my younger brother (he's 17, I'm 26). Not just from our dad but I imagine also from friends at school. Because he also dismisses the recent trend of woman-focused superhero movies as "feminist", makes dismissive comments about the LGBTQ students he's seen in school. I even heard him unironically use "social justice warrior" at least once,
At the very least, I'm glad he thinks our dad is crazy for denying climate change
But yeah, it's a problem, and unfortunately he's still at that age and mindset where he listens to our father about those issues more than me or other sources. It's very depressing to witness and I don't know what to do to help him or reverse that influence