Antisemitism is the hate or prejudice against Jews Germany was already hurt and broken down so when Hitler promised to make Germany great it rose there spirits his control grew stronger over Germany until they did everything he commanded then he gave them something to hate and rally against as a unit it made people hate Jews and since they had common beliefs and hating of Jews they were more connected Hitler also used propaganda which help spread the antisemitism
The second world war and cold war were related but were not morphed into one the cold war really only started because of America and Russia wanted to see the world super power they did not actually engage any other countries or even fight it was more of a Flex match to see whose the best the conflicts were not truly similiar