I think Scott was looking at it from a too US-centric perspective and part of what made the book interesting was drawing connections between movements around the world.
On top of that I would say he's also looking at it from a grey tribe[1] bubble. People in the red tribe and the blue tribe have analyzed the current situation from an ideological perspective and have missed the larger picture -- the analysis in this book is step 1 in disabusing people of the notion that this problem breaks down along purely political lines.
