mainly because hitler was hypnotically charismatic he was EXTAORDINARILY good at reading a crowds mood and saying things to get theyre support, his attack on jews was both personal motive and good strategy, one, HE think was outcopeted from art school by richer jewish children and also, the positons high p of the jewish people made them targets of resentment during the defeat of germany and of the ensuing restrictions and the depression. it made the jews easy targets, cultural differences made their position even more precarious. hitlers tactics achieved seveal things, ONE it established support of the people as a leader and someone who was the voice of the people.
he may be evil but ill be damned if he wasnt GOOD at what he did. thats what MADE him evil if he was incompetent wed bowl him over but he was good which made him hard to uproot