This speech is about how Hitler wants the country to be; not to collapse and be obedient to the government. After listening to his speech, I felt the charisma in Hitler and finally understood why the German people adored him so much. This was because his speech was so convincing and the people were somehow 'brainwashed' by him. The overwhelming response of the people after the speech tells us that how much they revere him.
It was during probably the election time when he gave this speech as he wanted the people to vote for him and hence get the power of the whole country. He was actually quite clever in the sense that he could craft his speech so well to persuade almost half Germany to vote for him and statistics shown later were in his favour.
In my opinion, I think that his speech was actually quite true at that time as there was a Great Depression and the German economy fell weak. Hence, Hitler wanted to tell the Germans that must bbe loyal their motherland and serve the country when they were young and not waster their teenagehood doing other things. Hitler also wanted the people to be obedient as maybe he was afraid that some people who were after that not agreeable with him and would overthrow him. If I am in the crowd that day, I might be convinced and perhaps carried away by the speech without even using critical thinking.