The bottom line: Facts matter. And propaganda is dangerous.
I’m less worried about saving the Republican Party — unfortunately, I think it can keep getting people elected by casting doubt on experts for another couple of decades at least. I’m worried about climate change, racism, etc. I welcome a diversity of opinions about how to address the issues. I don’t welcome anyone who goes beyond helpful skepticism to sow distrust of anyone doing honest research to investigate the issues in the first place.