In some parts of that book Zinn actually quotes from left wing columnists in order to provide ‘documentation’ for his distorted actually warped perspective.
Indeed ‘His Story’ and other radical liberal revisionists are a perfect example of ‘victors’ writing history. It will become much worse for posterity if some sort of braking system is not provided to halt these perverse ideologues.
Part of the problem--so far as enabling the corruption in academia--results from the explosion of opportunities outside those which depend upon the verbal arts--that draw off family oriented students, who would once have gone into law, literature, journalism, theology, etc., into lucrative new fields, where they can better provide for their families (a Conservative motivation).
Like it or not, we must fight on a very broad array of fronts. It is a sad truth that those motivated by hate are often more willing to sacrifice material ends, than are those motivated by love; and the forces of the Left are driven by a pathological hatred of the actual realities of human interaction & the natural order.