The so-called climate scientists have reduced the complicated coupled system that is climate to one variable: CO2 (cause or effect?). As the best engineer I know told me in grad school, people will ignore variables until they understand the problem. The last time I spoke with a PhD climate modeler (about 5 or so years ago), he told me their models (or at least his) assume the output of the Sun is constant. Apparently, NASA's instruments don't see variability in the output of the Sun, which actually raises more questions.
Again, the question that should be debated is whether civilization is prepared for a changing and unpredictable climate. My guess is we are not.