I know this feels obvious on paper, but when I look at people arguing for evolution or vaccines, it doesn't look that way. I want to stress again that most people don't go outright and insult people. Rather, arguments from the pro-vaccine, pro-evolution, etc. camps often have a subtle context of, "this is obvious, why are we even still talking about this?" When summed up across countless conversations, though, it constructs a trope of "people who don't believe in evolution are ignorant savages." It's then really hard to keep that subtext out of your conversations.