Answer:
"Hostility to or prejudice against Jewish people." Is the definition.
The reason he saw the Jews as the problem was he said they were the reason Germany lost. There is a myth thats called ‘stab-in-the-back legend’ that became popular. According to this myth, Germany did not lose the war on the battlefield, but through betrayal at the home front. The Jews, Social Democrats, and Communists were held responsible.
Hitler blamed the Jews for everything that was wrong with the world. Germany was weak and in decline due to the 'Jewish influence'. According to Hitler, the Jews were after world dominance. And they would not hesitate to use all possible means, including capitalism. In this way, Hitler took advantage of the existing prejudice that linked the Jews to monetary power and financial gain.