I respect our German members for participating in what is undoubtedly an uncomfortable thread.
I watched the speech in the OP. Very interesting, but also incredibly twisted in a subtle and sophisticated manner. There was a reason Hitler and his boyz rose to power... he was a MASTER orator. He could tailor a speech for a given audience, and take feedback from that audience in real time to mold them like clay.
His comments: "Roosevelt has no business commenting on the affairs of central EUROPE." Sounds good, right? Think about it... EUROPE was not then, never was, a monolithic entity, and Germany had no right to comment on other independent nations either. Roosevelt has as much right to comment on Czechoslovakia and Poland as Germany does.
Hitler spins the classic image - Roosevelt as the top-hatted capitalist elite. Before the National Socialist Party focused on Jews as the scapegoat, believe it or not, Capitalists were the perceived enemy of the Nazis. Look into the history of Goebbels, the propaganda minister. In the early 1930's, his writings were rants against the capitalist system. Only after Hitler convinced him did he become a raving anti-semite.
The Nazis manipulated the German people in ways never before or since seen.
As for Post WW-2 and the actions of the USA - how quickly people forget about the USSR. The Warsaw pact had hundreds of motorized divisions poised to pour into West Germany. They started dozens of wars big and small by ideological proxy. The U.S. (and NATO) strength was devoted and formed to counter this.
Hitler was from what ive read - a brilliant salesman - a brilliant conman. Could make black into white and vice verse. Millions of people were slaughtered and had their lives ruined by his actions. By looking at the results of his action the world took decades to allow the scars to heal. To play a speech and attempt to decipher what he meant and whether is interesting to see the mindset he had but one must always bare in mind what his real intent was. An evil man beyond description.