As far as Dutch and English he recognized them as Germanic peoples and therefore aryans. The idea that he only liked Germans themselves most likely is an attempt for some groups of people to claim victim status and downplay Jewish and Romani Genocide. As far as Slavs went, it became racial as he saw them as not only heavily influenced by as he called it “international Jewry”, but also genetically tainted by centuries of invasion from asiatic steppe peoples like the Huns and Mongols and Khazars. In Hungary, he also described as “An asiatic people of the Eurasian steppe”. He respects the Scandinavians as well but believed that it was his mission to cleanse their spirit as to be an “aryan” must be purity of both blood and mind. The more you research into Hitler the more you see he was truly a psychopath and it’s amazing people would follow someone with the same ideas as a meth addicted Schizophrenic. His theories have been proven wrong for over 50 years and his followers even today time and time again have been made fools of. Anyone who in this day and age actually believes in racial superiority is nothing more than a caveman banging rocks in a cave to make fire. As for Americans he thought that it was a mulatto land that was overrun with blacks and Jews and Slavs and Catholicism.

Hi there,

On /r/AskHistorians we often get questions along the lines of 'what did Hitler think about X' - I mean, as an April Fools joke one year, we changed the sub to /r/AskAboutHitler. However, for better or worse, many of these questions about what Hitler thought are, in the literal sense, unanswerable. We don't know what Hitler thought about many things, and especially about things which were inconsequential for him. Hitler did not keep a diary, and the collections of his private conversations is disjointed and nowhere near complete, being almost completely dependent on the post-war recollection of his intimates (who may also be unreliable in their recollections, especially given those circumstances).

Of course, you may still get an answer to this particular question! However, broadly speaking, proving the negative is very hard (there could be an 1965 article on the topic in Swahili), and if you've asked a question which is almost certainly "We don't know, and he probably didn't care anyways", few historians familiar with the topic matter actually are going to want to put in the necessary gruntwork, doubly so about a man who on a personal level was decidedly uninteresting.

For more information that will be helpful in understanding the context around your question, please read /u/commiespaceinvader's wonderful post on why Hitler's opinions actually aren't that interesting, and please see here for an example of a historian attempting to find evidence about Hitler's thoughts on a topic, but finding that it is likely unanswerable.