No question there. And yet reality exists, independent of even the most biased, self-serving vision of it. 

This would include one of GW Bush's inner circle, reputedly Karl Rove, who told Ron Suskind, "We're an empire now. We create our own reality" after expressing utter disdain for "the reality based community."

Historians who write propaganda become infamous, or, worse, they invite self-destructing visions of nationhood. History, like the devil, is not to be mocked.