Greenland temperatures (such as those shown in your last plot) show much less increase than anywhere else on the planet. They are NOT representative. Two studies, using a large selection of proxies from all over the planet have been performed, covering from the present back 11,000 years, the second taking us back another 11,000 years to the beginning of the Holocene. Their data look like this:
These data aren't Greenland, they're the planet Earth.
These data aren't Greenland, they're the planet Earth.