I spent three hours convincing a couple MAGAs on nextdoor that global warming is real and we've known for nearly 100 years. Had to go into remedial science mode and explain why greenhouse gasses trap heat in, complete with videos showing CO2 experiments like they do in high school. One guy begrudgingly agreed but the second guy was shook. I think he started coming to terms with the fact he's blindly believed lies and started questioning other "truths".
There may be hope, but he might've just turned Fox on after and stuck his head back into the sand.