He began his career in politics as a extremist and none took his ideas seriously
After he tried to rebel against politics and almost succeed he was arrested and sentenced to 5 years but got let of easily with only 9 months. this was because of his growing popularity in the population after the publish of his mien kampf .
this was his book
After Hitler came to power he had a hatred towards Jews and started a mass germicide against them. and killed over 6 million Jews. This was taken by the German population very well due to the propaganda he put out against the Jews.