This quote is from the book “Hitler: 1889—1936: Hubris,” published in 1998 by Ian Kershaw.
“Without the changed conditions, the product of a lost war, revolutions, and a pervasive sense of national humiliation, Hitler would have remained a nobody. His main ability by far, as he came to realize during the course of 1919, was that in the prevailing circumstances he could inspire an audience which shared his basic political feelings, by the way he spoke, by the force of his rhetoric, by the very power of his prejudice, by the conviction he conveyed that there was a way out of Germany’s plight, and that only the way he outlined was the road to national rebirth. Another time, another place, and the message would have been ineffective, absurd-even. As it was, indeed, in the early 1920s the great majority of the citizens of Munich, let alone of a wider population to whom Hitler was, if at all, only known as a provincial Bavarian hot-head and rabble-rouser, could not be captivated by it. Nevertheless, at this time and in this place, Hitler’s message did capture exactly the uncontainable sense of anger, fear, frustration, resentment, and pent-up aggression of the raucous gatherings in the Munich beerhalls. The compulsive manner of his speaking derived in turn much of its power of persuasion from the strength of conviction that combined with appealingly simple diagnoses of and recipes to Germany’s problems.”