How did Hitler fulfill the promises of the Nazi Party?
The Nazi Party had two main promises. First, it promised that it would make Germany strong and powerful again. Second, it promised that it would punish the Jews for their role in weakening the country. Hitler fulfilled both of these promises.
To fulfill the anti-Semitic part of the Nazi platform, Hitler imposed ever harsher laws on the Jews. He started out by excluding them from various professions in Germany's economy. He continued with such laws as those banning Jews from being German citizens. He finally ended up perpetrating mass murder against them.
To fulfill the party's promise of power and strength, Hitler rebuilt the military. He did so in contravention of the Treaty of Versailles. By rebuilding the military, he made many more jobs for the people and helped to bring prosperity back to Germany. He made Germany more of a power by intimidating the various countries of Europe. By the time just before WWII broke out, he had absorbed Austria and Czechoslovakia into Germany. By doing these things, he had made Germany prosperous and powerful once again.