Once more and for the last time in good faith, it's the trend line that matters. The earth hasn't experienced even remotely close to this rapid a change in temp

Once more and for the last time in good faith, it's the trend line that matters. The earth hasn't experienced even remotely close to this rapid a change in temperature in the 20,000 years captured by that chart. To take your example from the gold smithing era. The earth warmed from -.5 -> +.6 degrees over the course of about 4000 years. We've warmed that much in the last 100 years.