This is sometimes referred to as the "twisted road" to genocide, after a book by Schleunes called "The Twisted Road to Auschwitz". Extreme intentionalists believe that Hitler definitely had plans for the Holocaust by 1924, if not earlier. Dawidowicz argued that Hitler already decided upon the Holocaust no later than by 1919. To support her interpretation, Dawidowicz pointed to numerous extreme anti-Semitic statements made by Hitler. Criticism has centered on the fact that none of these statements refer to killing the entire Jewish people; indeed, very few refer to killing Jews at all. Only once in "Mein Kampf" does Hitler ever refer to killing Jews, when he states "If at the beginning of the war and during the war twelve or fifteen thousand of these Hebrew corrupters of the people had been held under poison gas, as happened to hundreds of thousands of our very best German workers in the field, the sacrifice of millions at the front would not have been in vain." Given that "Mein Kampf" is 694 pages long, Dawidowicz's critics contend, she makes too much of one sentence. Daniel Goldhagen went further, suggesting that popular opinion in Germany was already sympathetic to a policy of Jewish extermination before the Nazi party came to power. He asserts in his book "Hitler's Willing Executioners" that Germany enthusiastically welcomed the persecution of Jews by the Nazi regime in the period 1933–39. Moderate intentionalists such as Richard Breitman believe that Hitler had decided upon the Holocaust sometime in the late 1930s and certainly no later than 1939 or 1941. This school makes much of Hitler's "Prophecy Speech" of January 30, 1939 before the Reichstag where Hitler stated "If the international Jewish financiers in and outside Europe should succeed in plunging the nations once again into a world war, then the result will not be the victory of Jewry, but the annihilation of the Jewish race in Europe!" The major problem with this thesis, as Yehuda Bauer points out, is that though this statement clearly commits Hitler to genocide, he made no effort after delivering this speech to have it carried out. Furthermore, Ian Kershaw has pointed out that there are several diary entries by Joseph Goebbels in late 1941, in which Goebbels writes that "the Führer's prophecy is coming true in a most terrible way." The general impression one gets is that Goebbels is quite surprised that Hitler was serious about carrying out the threat in the "Prophecy Speech."