I found a copy of Mein Kampf . There are a few quotes pasted below and I recall him talking about the over ethnic mixing so there was no German majority and how it reduced the intellectual capabilities of Austria (because everyone was fighting and he didn't think much of Slavs).

I was convinced that even if it should sacrifice the German element the Danubian State could not continue to exist. Even at the price of a long and slow Slaviz-ation of the Austrian Germans the State would secure no guarantee of a really durable Empire; because it was very questionable if and how far the Slavs possessed the necessary capacity for constructive politics.

Here is another one:

Once the influence of the Germans in Austria had been wiped out, what then would be the value of the alliance? If the Triple Alliance were to be advantageous to Germany, was it not a necessary condition that the predominance of the German element in Austria should be maintained? Or did anyone really believe that Germany could continue to be the ally of a Habsburg Empire under the hegemony of the Slavs?

The official attitude of German diplomacy, as well as that of the general public towards internal problems affecting the Austrian nationalities was not merely stupid, it was insane. On the alliance, as on a solid foundation, they grounded the security and future existence of a nation of seventy millions, while at the same time they allowed their partner to continue his policy of undermining the sole foundation of that alliance methodically and resolutely, from year to year. A day must come when nothing but a formal contract with Viennese diplomats would be left. The alliance itself, as an effective support, would be lost to Germany.

And one that is quite revealing:

Even in Pan-German circles one heard the opinion expressed that the Austrian Germans might very well succeed in Germanizing the Austrian Slavs, if only the Government would be ready to co-operate. Those people did not understand that a policy of Germanization can be carried out only as regards human beings. What they mostly meant by Germanization was a process of forcing other people to speak the German language. But it is almost inconceivable how such a mistake could be made as to think that a Nigger or a Chinaman will become a German because he has learned the German language and is willing to speak German for the future, and even to cast his vote for a German political party. Our bourgeois nationalists could never clearly see that such a process of Germanization is in reality de-Germanization; for even if all the outstanding and visible differences between the various peoples could be bridged over and finally wiped out by the use of a common language, that would produce a process of bastardization which in this case would not signify Germanization but the annihilation of the German element. In the course of history it has happened only too often that a conquering race succeeded by external force in compelling the people whom they subjected to speak the tongue of the conqueror and that after a thousand years their language was spoken by another people and that thus the conqueror finally turned out to be the conquered.

is probably a good place to ask. I believe I heard Hitler wanted to eliminate Slavs, but that could be just Russians. Also, I know he thought Southern Europeans were dumber an lazier than Northern counterparts. However, he obviously still could work with them and had no plans to eliminate them.

He hated them so much, that along with other officials attended the funeral of the great Polish general Pilsudski in 1935: https://rarehistoricalphotos.com/adolf-hitler-memorial-pilsudski-1935/ Let me quote:"This was the only time that Fuhrer attended a holy mass as a leader of the Third Reich and probably one of the last times when he was in a church.". He deeply respected Marshall Pilsudski for defeating Russia during 1919–21 Polish-Soviet War, as it was one of not many in the history of our motherland (Im Russian)

"In 1939 when the Germans took Kraków (Krakau) Hitler ordered the Wehrmacht to set at Piłsudski’s grave a honor guard. After he attacked Poland, he would say that things wouldn’t turn out like that if old Pilsudski was still alive. He was also very excited when Pilsudski congratulated him on winning the elections in 1933."

Poland had to be invaded first to open the buffer zone to Russia. That was the plan all along. thousands of Polish kids were transferred to Reich to be raised as German. Also in Polish schools the Germanization was in full swing. They wanted to convert them to German as a valuable citizens. Hitler was fully aware, as he saw Polish soldiers during WW1, that it will be technically impossible to easy grab PL. Let me explain here: Poland didnt exists during WW1, but those people were Polish blood and bone. They didnt fuckin care that country doesnt exist. They will make one when opportunity arises and they did.

Thats why Ribbentropp-Molotov treaty was established, to invade Poland from both sides: Germans 1.09.1939 and from our side:2 weeks later. Of course Poland crushed by 2 superpowers couldnt stand a chance but somehow it managed for a very long, unexpected time.

After WW2 the territory has been given to us, as a satellite country, but as the only one was never converted to the Russian province. The inertia there is mind-fucking-blowing. I wish all the success to anyone who will try to propagandize of destroy them as a nation, but I doubt the success will ever happen. Also after 1990 this is the only country in whole region that stays untouched. Germany split by half, Czechoslovakia split by half, Russia split to the clusterfuck of ex-SSR's and Poland like this fuckin donkey stands there in the center of all of this and doesnt give a fuck. I deeply respect them, you just cant crush this spirit. They declared officially Jesus Christ as their king and now go ahead and kill him, if you can. Looks like as long as he's in existence - this nation will be as well.

The rest is a history. Written by victors.

I'm no hitler expert but from what I've just read here, it's not that a clear cut regarding slavs

https://en.wikipedia.org/wiki/Anti-Slavic_sentiment#Nazi_Germany

>Anti-Slavic racism was an essential component of Nazism.[9] Adolf Hitler and the Nazi Party regarded Slavic countries (especially Poland, the Soviet Union, and Yugoslavia) and their peoples as non-Aryan Untermenschen (subhumans), they were deemed to be foreign nations that could not be considered part of the Aryan master race.[1]Hitler in Mein Kampf stated: “One ought to cast the utmost doubt on the state-building power of the Slavs” and from beginning rejected the idea of incorporating Slavs within Greater Germany[10] There were exceptions for some minorities in these states which were deemed by the Nazis to be the descendants of ethnic German settlers and not Slavs who were willing to be Germanized.[9] Hitler considered the Slavs to be inferior, because the Bolshevik Revolution had put the Jews in power over the mass of Slavs, who were, by his own definition, incapable of ruling themselves but were instead being ruled by Jewish masters.[11] He considered the development of Modern Russia to have been the work of Germanic, not Slavic, elements in the nation, but believed those achievements had been undone and destroyed by the October Revolution.[12]

Edit: That wiki entry bit above, partially reproduced here, is quite interesting btw technically speaking

Boatload of technicalities explained in a very concise way

you guys might want to comment on this.