Both my friend and her brother are graduates, both had well paid careers in the public sector, both have very comfortable lives in retirement thanks to gold-plated pensions and money inherited from their late parents' estate. And both genuinely believe themselves superior to most of those around them because of their advantages and because they are so much better informed - courtesy of the Guardian - than anyone else. This superiority complex is pretty common I've found and it's class-based: the managerial middle classes have come to despise and ridicule any views other than their own.
Neither of them are critical thinkers and they do, literally, believe anything and everything they read in the sacred pages of the Guardian. Naomi Klein may consider herself a socialist but I suspect she also despises those who don't adopt the Guardian mindset.