The book was really enlightening and went through some of reasons of the rise of Donald Trump. The one in the forefront being liberals have removed all protections from the working class in the form of NAFTA and other measures like welfare reform. Instead of champanioning New Deal style policies and safety nets they champion more education putting the responsibility on the individual.
Also from my own view, liberals seem more concerned with transgendered people and global warming than families with no opportunity torn apart by opiate addiction and deindustrialization. The hatred of liberals in those circles seems to come from a rational place.