Wait, doesn't your rebuttal show that the earth's temperature will not spiral out of control leading to the death and destruction predicted? :P
I don't recall ever making such a prediction.
To be honest you make great points for the view that we are really in a geologic cold period and global warming is just returning us to average temperatures for geologic time frames.
Yep, that's pretty much correct. The Earth is, on the average, quite a bit cooler than it has been in the geological past. It does not always have ice caps.
It happens that this is the climate that we humans are used to, and we've rather built our habitats and our agriculture around. But, on a geological scale, a few degrees of warming, and melting the polar ice caps. is no big deal. It's not the end of the world.
--unfortunately, when we return the planet to the climate conditions of the Jurassic, we probably don't get the dinosaurs back. But then, if biological research keeps on track, we'll just make new ones.