Here is some of the proof of Hitler's mentality, but more can definitely be found if one looks hard enough.
http://www.hitler.org/writings/Mein_Kampf/mkv2ch14.htmlThen, without consideration of 'traditions' and prejudices, it must find the courage to gather our people and their strength for an advance along the road that will lead this people from its present restricted living space to new land and soil, and hence also free it from the danger of vanishing frotn the earth or of serving others as a slave nation.
In chapter 14, evidence is presented that Hitler wanted to expand, and as we see through his later actions, that expansion was to be aimed at Eastern Europe.
http://www.hitler.org/writings/Mein_Kampf/mkv2ch02.htmlUnfortunately, a policy towards Poland, whereby the East was to be Germanized, was demanded by many and was based on the same false reasoning. Here again it was believed that the Polish people could be Germanized by being compelled to use the German language. The result would have been fatal. A people of foreign race would have had to use the German language to express modes of thought that were foreign to the German, thus compromising by its own inferiority the dignity and nobility of our nation.
Chapter 2, this is proof that Hitler had no plans of working with the natives of the countries he expanded in. He, instead, had plans to replace them with Germans. Also, this is proof, beyond a reasonable doubt, that Hitler (correctly) didn't consider Poles aryan.
http://www.hitler.org/writings/Mein_Kampf/mkv2ch14.htmlFor the organization of a Russian state formation was not the result of the political abilities of the Slavs in Russia, but only a wonderful example of the state-forming efficacity of the German element in an inferior race.
In Chapter 14, evidence of anti-slav sentiment, particularly anti-Russian sentiment, is shown.
http://www.hitler.org/writings/Mein_Kampf/mkv1ch03.htmlI was repelled by the conglomeration of races which the capital showed me, repelled by this whole mixture of Czechs, Poles, Hungarians, Ruthenians, Serbs, and Croats, and everywhere, the eternal mushroom of humanity-Jews and more Jews.
To me the giant city seemed the embodiment of racial desecration.
The German of my youth was the dialect of Lower Bavaria, I could neither forget it nor learn the Viennese jargon. The longer I lived in this city, the more my hatred grew for the foreign mixture of peoples which had begun to corrode this old site of German culture.
Here (outside of Mein Kampf) Hitler bashes many Eastern European peoples, some of which are not slavic.