I spent years as a freelance proofreader and copyeditor. One of the reasons I don't so much any more is I was getting too many political books, books where the authors were not so interested in facts or logic--or even internal consistency. Most of these books were 'conservative' but this was not exclusively a right-wing issue. Ideology requires glossing over the complexity of the real world. It's draining to read this stuff, with limited ability to make corrections.

Hell, now I work for a uni press, and I'm seeing this in our own list more and more--writers are giving up on deep analysis.