VERY informative article on Salon.com about Beck's source of inspiration:

"In reality, however, the so-called 912ers were summoned to D.C. by the man who changed Beck's life, and that helps explain why the movement is not the nonpartisan lovefest that Beck first sold on air with his trademark tears. Beck has created a massive meet-up for the disaffected, paranoid Palin-ite "death panel" wing of the GOP, those ideologues most susceptible to conspiracy theories and prone to latch on to eccentric distortions of fact in the name of opposing "socialism." In that, they are true disciples of the late W. Cleon Skousen, Beck's favorite writer and the author of the bible of the 9/12 movement, "The 5,000 Year Leap." A once-famous anti-communist "historian," Skousen was too extreme even for the conservative activists of the Goldwater era, but Glenn Beck has now rescued him from the remainder pile of history, and introduced him to a receptive new audience."
article, Meet The Man Who Changed Glenn Beck's Life (Skousen)