I notice the tendency of those at this message board who believe in significant human-induced global warming to spit out labels or insults like "denialist", "sceptic", "hack", "neocons" etc. about those who are more critical. I think you've done a good summary of the most important factors that dominate climate change, and I doubt much of a human contribution. That doesn't mean I don't support gradually switching from fossil fuels, believe in no pollution controls etc.

If some want to claim warmer temperatures are going to be, say, a "world-wide economic and environmental disaster", then it should not be hard to show many examples of economic collapse and environmenal devastation during recent warming, like the Holocene Maximum (4000-7000 years ago) and the Medieval Warm Period (700-1000 years ago), as indicated on your graphs.

Forget climate models, what does history and prehistory teach us about generally warmer temperatures and their overall effects on society and biodiversity?