I would say his popularity came from his pledge to restore 'order' in the country which was plagued by mass unemployment and strikes by socialists and communists. His blackshirts beat up socialists and communists. Obviously the socialists and communists opposed his rise as did many other working class people. Some of the middle class shopkeepers, doctors, lawyers etc worried about the rise of socialism in the new Soviet Union also supported him.
The United States and Japan or Russia
