I read Crichton's "Author's Message" when I read the book.
The point is that "Sudden Climate Change" (formerly "New Ice Age", formerly "Global Warming") scientists are killing their own arguments, however valuable, by polluting their research and message with money and politics.
Nothing is more inherently political than our shared physical environment, and nothing is more ill served by allegiance to a single political party. Precisely because the environment is shared it cannot be managed by one faction according to its own economic or aesthetic preferences. Sooner or later, the opposing faction will take power, and previous policies will be reversed. Stable management of the environment requires recognition that all preferences have their place: snowmobilers and fly fisherman, dirt bikers and hikers, developers and preservationists. These preferences are at odds, and their incompatibility cannot be avoided. But resolving incompatible goals is a true function of politics.
We desperately need a nonpartisan, blinded funding mechanism to conduct research to determine appropriate policy. Scientists are only too aware whom they are working for. Those who fund research --- whether a drug company, a government agency, or an environmental organization --- always have a particular outcome in mind. Research funding is almost never open-ended or open-minded. Scientists know that continued funding depends on delivering the results the funders desire. As a result, environmental organization "studies" are every bit as biased and suspect as industry "studies." Government "studies" are similarly biased according to who is running the department or administration at the time. No faction should be given a free pass.
Because of the Left Stream Media being a strong watchdog of the Republican government, excesses are aired and corrected (as they should be). They would get more legitimacy of course if they toned down the Bush hate and hysteria that cloud their minds. When their pals are in power, the watch dog goes to sleep mostly (sex scandals they find too hard to resist regardless). So there is no equilibrium in affecting public perception: the Left has a clear upper hand in propaganda. I would support his "nonpartisan" thesis otherwise, but in reality "nonpartisan" spells out "advantage Left".