"I've received yet another email indicating that the author thinks I don't believe man is responsible for global warming. This comes about because of an insidious sort of tribalism that has turned conversations about climate change into a 'you're either with us or against us' situation."

This has been my experience as well when I try to discuss the science. People want me to come out as either 'pro-Warming' or 'anti-Warming' and I'm not either. I'm interested in the systems problem that global climate represents.