Putting aside whether they’re Trumpers or card carrying communists, there’s a reason that some kind of Overton window tends to occur: viewpoints aren’t relative, and some viewpoints are wrong (on facts, on outcomes, ie. completely detached from reality). Diversity isn’t productive if we are expected to value dangerous delusions. Valuing off-beat or contrarian ideas, sure. But: I like milk and sugar with my tea, you want to smash capitalism violently for the rise of the proletariat; I think that Education should be free but speech should be censored, you believe in concentration camps, QAnon and pizzagate. This can get silly.