Hitler (20 April 1889 30 April 1945) and his party were fighting the Communists after WW1, and many people in Germany were afraid of the Communists who had won in Russia in 1917, during WW1, and later had formed a government in the South of Germany. See
..... "An enemy of my enemy is a friend!" As a result Hitler got lots of support from the many people in Germany and other countries who were afraid of Communism. No wild roses then.
..... Many politicians get/got support, probably legally and illegally, including the 2 Bush and Obama. Fear can be a powerful stimulus. It often helps to look for causes of events.