kds ji
My response is not as good as I would like it to be. Too simplistic. However Hitler did see Slavs as inferior people. He bought completely into the mythology that the aryan, fair, blue-eyed German "race" was descended from an ancient and genetically pure race. That over the centuries the race had become polluted by war, invasion, and the dilution of cultures. In the mind-set of Hitler there were degrees of purity. One could spot a pure Aryan by his/her complexion, hair and eye color, as well as body build. Tall lithe muscular. Then other etnicities were graded according to how different they were from the aryan ideal. Slavs can be short, broad boned, and dark. Or they can be tall and thin, but there is "intermingling" so the gentic pool could not be trusted. Hitler saw the English, Swedes, Norwegians, Danes as closer to his aryan idea. Interestingly the Norwegians and Danes did not buy it and were not very cooperative --and both countries paid dearly for their resistance.
Hitler's flunkies went as far to engage in genetic experimentation. There was an institution (US/Brits called them "stud" farms) where German girls who fit the aryan profile were mated with German men who also fit the profile of the new Aryan. That way more aryan babies could be bred, and raised to continue the pure race.
At the same time aryan babies were being bred, the "racially unfit" were being exterminated. The mentally ill, retarded, gypsies, homosexuals all were sent to extermination camps before the Jews. A lot of this happened starting in the mid-1930's -- and the rest of the world knew it was going on.
To get to your quesiton of the Slavs again. There were basic economic reasons for the German advances against the Slavs. Germany was broke and there were no natural resources to support the war effort. The Slavic states held reserves of mineral wealth. The Slavic states of Central Europe stood between Hitler and Russia and its fertile farmlands. Russia stood between Hitler and the vast oil reserves of Georgia, and Central Asia. Russia also had political and economic presence in the Gulf States of Iran, Iraq, the emirates, which also held vast oil reserves. So Hitler had to destroy Russia, and to do that Hitler had to enslave the Slavs. It is easy think to enslave a nation if you believe they are genetically inferior and you can make up a story to support the myth.
An important footnote to all of this: the Nazi's found sympathizers in some central European states (Croatia, Hungary, and Western Ukraine). The sympathizers were politically elevated, but not always to their advantage. Poland, Hungary and Western Ukraine sent large numbers of its most educated men and women to work in slave labor camps in support of the 3rd Reich. Just one step above the death camps.
I have a very good friend whose mother was sent to one of those camps. A Ukrainian woman. After she was liberated and sent to a DP campu in Italy, she was able to migrate with her family to the US. My friend told me that her mother never slept the night through. She often caught her on her knees in prayer hour after hour -- explaining that she saw so many horrible things that her own soul was lost.
