Your chart showing past history? ...
They were not only cooking current data...
They were also cooking the historical recorded to change the accepted history to say it was not that warm in the past so you chart would not exist as "truth"
Pure "1984" memory hole stuff
The left has done "revisionist" history for years so "revisionist" science data should expected... it's the Left's SOP
Yes, they were very concerned about eliminating the "Medieval Warm Period", as that upset a lot of their premises.