What if Mann really did thoroughly screw up the “Hockey Stick”[1] graph?

There is no question that he did misuse the data to produce the hockey stick graph. It is pathetic to suggest that rational people should discount the obvious history record and trust anything that is contrary to it. They had to revise the history because it was obvious that we aren't in any warming that is out of the ordinary. Lamb's data is obviously flawed if it contradicts history. Why do you think they lied and hid the raw data from review? It wasn't because it backed up their fairytale.