Why Are The Ignorant So Passionate?

I moderated a panel on infrastructure and jobs at the Bipartisan Policy Center this morning, and one of the topics that came up was an infrastructure bank.  Asked about it, one of the panelists said "what I'd like is to make all the members of Congress write a 100 word essay on what an infrastructure bank is."  It was a good line, and the audience laughed because it hints at something all too true when it comes to discussing policy: there are a lot of ferocious advocates of policies they can't explain.