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
Yes because they all tried to solve issues with war, economics, and society. The "New Deal" from FDR, the "New Frontier" by JFK, and the "Great Society" by LBJ.
World war 1 put Russia in debt and the people of Russia didn't think that they should even be in this war. so they started a revolution which eventually put an end to the Russian monarchy.
There were of course several people who held this view, but perhaps the most prominent was Woodrow Wilson, the President of the United States, who pushed for a much more secure Europe after WWI to prevent such things from happening again.