Very simple. Adapting to a rapidly changing climate is preferable to changing our present habits, no matter how destructive they are to the coming generations, or to the rest of the biosphere.
For most people, the present rapid changes are already stretching their abilities to adapt. They see jobs that they considered safe niches now gone forever, with no demand for skills that took years to develop, and now the scientists are telling them that they have to change even more. That we should cease to use fossil fuels asap, that we need to switch to an energy base that features nuclear, wind, solar, geothermal, and other non-polluting sources, that they do not understand, and have no experiance with.
I see otherwise intelligent people convincing themselves of the scientific equivelant of the sun rising in the West simply because they wish to avoid any more changes in the lives, and the way that they live. Which, of course, pushes the changes onto their children, and grandchildren, who will be facing a much more serious situation concerning the effects of a changing climate, a rapidly changing climate, than we face today.
Well, that is the culture of this nation, and our children will suffer the consequences of our inability to face reality.