The book very accurately describes Clinton voters' concerns about President Trump. I imagine there is a section that describes Trump voters' concerns about Clinton, which I imagine are "foreign trade hurting rank-and file workers and making the US too dependent on unfriendly countries", "career politicians beholden to donors and favors", and "US spending too little on military and taking on too much responsibility to defend other countries." I hope the text wisely omits conspiracy theories involving Clinton murders or Trump treason.

The critics of the text come of as people who start out outraged and look for anything to be outraged about.

Of course it's disturbing. That's one reason they do it; that and the propaganda value. They can't win with truth so the lies proliferate.
They are the current victors in the war for the minds of American youth. But the battles continue and the natural genetic advantages of free markets and human nature are against the limbiciles.