Answer:
so basically he came to power slowly by saying jews are horde creatures that need to be getting rid of, so after that people appointed him to power and he established the Nazis. Then all hell happened :)
Leading the people to believe false information
It was because of Communism. America wanted to STOP the spread of Communism, but Russia wanted it to influence the other countries to also become communist ones.
I hope I helped! =D
I thinks it’s b i dont know