Check your bias at the door and take a second look.
There is no question at all that the graph shows a dramatic rise from around halfway through the 20th century.
Are you seriously claiming that it does not exist?
The dramatic rise is the instrument record.
The previous 2000 years on the graph are all proxies. The last 50 years is instrument.
As I said, there is no relation between the instrument record and the proxy record except that the measuring is on the same planet.
The nature of the measurements is completely and entirely different.
For your convenience:
File:2000 Year Temperature Comparison.png - Global Warming Art