"It should be up to the American people to decide what's true." That is a truly radical statement, spitting in the face of the last 2000 years of human progress. We used to burn witches, torture heretics, and believe the earth was at the center of the universe; the underpinning of nearly every development that has allowed us to move past those times is the idea that there exists an external reality independent of belief.
It reminded me of this Krugman column from a couple years back:
What I mean...is that know-nothingism — the insistence that there are simple, brute-force, instant-gratification answers to every problem, and that there’s something effeminate and weak about anyone who suggests otherwise — has become the core of Republican policy and political strategy. The party’s de facto slogan has become: “Real men don’t think things through.”