Took me two seconds to debunk that. What was your point in posting that chart?
https://www.skepticalscience.com/print.php?r=337
What The Science Says:
This argument uses temperatures from the top of the Greenland ice sheet. This data ends in 1855, long before modern global warming began. It also reflects regional Greenland warming, not global warming.
Climate Myth: Most of the last 10,000 years were warmer
Even if the warming were as big as the IPCC imagines, it would not be as dangerous as Mr. Brown suggests. After all, recent research suggests that some 9,100 of the past 10,500 years were warmer than the present by up to 3 Celsius degrees: yet here we all are.
What's really scary is that Wez has no clue which side of the fence he's on......