Point One - if Davis did indeed fudge his research, invent stories or fabricate evidence, then he's broken the ethical and intellectual standards by which historians are constrained. If such accusations are true, then let him drain the poisoned cup he mixed for himself.
To be fair to the author, I spent a few hours in the library checking his footnotes. No, I didn't have time to review the whole book, since I do aspire to something of a life beyond the stacks; however, I didn't find anything unsupported by the sources cited. If anyone is inclined to respond to this post, could you please point out just where he lied? I'd appreciate your insights, since I didn't unearth falsification myself.
Point Two - the moral of the story is simple, and one that no ad hominem attack (Communist! Socialist! Liberal! Leftist! Phony!), however venomous, can weaken. The moral has nothing to do, in fact, with Davis' obvious leftist leanings. Los Angeles today, more than any other single location in the developed world, represents a nearly total disconnection between what people imagine their lives to be and what physical reality is.
If you wracked your brain for weeks, you couldn't come up with a worse place for millions to live. A semi-desert to begin with, the city depends on the vagaries of the Sierra snowpack and the flow of the notoriously capricious Colorado, among other rivers. LA sits in the middle of one of the most seismically active regions on the planet. Toss in a continual, interlocking cycle of horrendous wildfires, torrential rains, flash floods and mudslides for good measure. The result is a violently dynamic land, subject to sudden change.
Yet the detachment of the good burghers of Malibu from their surroundings is such that they demand fire protection for each and every inaccessible house sited in tinderbox terrain while refusing to pay for improved water lines or widened streets. Willful ignorance of the geophysical facts of life prevails in Thousands Oaks as well, and in Orange County, and throughout the region. There's a handy English word for this kind of behavior - stupidity.
What this book does, and does superbly, is reflect the undying human desire to make uncomfortable facts vanish by fervently pretending that they do not exist.