What Cass Sunstein and the New Yorker get wrong about conspiracy theories

Ezra Klein and Cass Sunstein have some sensible things to say about the disturbing prevalence and power of conspiracy theories  in this Vox video, especially about the toxic combination of conspiracy theories, ignorance, and extremism. So does the New Yorker. But these opinion-makers are wrong--or rather, underinformed--about the JFK story. Sunstein, wi…