Some reading here
encyclopedia.ushmm.org/content/en/article/adolf-hitler-1924-1930?series=4
Using language developed from discussions with groups of potential voters about their hopes and fears, Nazi speakers developed themes geared to reconcile these traditional areas of conflict and to stoke fear of:
inadequate national defense and sovereignty
communism
enslavement under the terms of the Versailles Treaty to foreign political and cultural influence, control and oppression
economic decline and job insecurity
increasing moral depravity in German society, allegedly generated by Jewish and other internationalist influences using the tools of democracy and Germany’s alleged weakness and lack of self-esteem
The Nazis promoted a future of national renewal, in which they would:
restore Germany’s strength and pride by tearing up the Treaty of Versailles
establish a self-sufficient and prosperous economy that guaranteed full employment based on talent and national patriotism
cleanse Germany’s streets and mass/popular media of criminal activity, asocial behavior and allegedly immoral expression
annihilate the alleged Marxist (Communist/Socialist) threat to German politics and culture
remove foreign and Jewish influences (political, economic, cultural, intellectual and genetic) that allegedly undermined German society
Modern technology (e.g. air travel, radio, mass rallies with technological bells and whistles, and deep engagement of the country’s youth) enhanced Nazi campaigning.
Hitler himself, the first German politician to use air travel in a political campaign, blanketed the country to deliver his message of national renewal to a nation perceiving itself to be increasingly spiraling into an existential and lethal political, economic and cultural/moral crisis.
In the September 14, 1930 elections, the Nazi Party captured 18.3% of the vote, depending significantly on new voters, unemployed voters, and alienated voters deserting the middle class parties
No political party leader rivaled Hitler’s personal charisma in addressing large crowds, small groups, or individuals, or the appeal the Nazis generated with modern electoral practices:
market research to identify concerns and hopes of potential voting groups and incorporation of those concerns and hopes into stump speeches
air transport to move Hitler and other Nazi speakers around the country quickly during elections
massive, carefully choreographed rallies throughout the country, reaching across traditional boundaries of class, education, region, income, religion, age and gender
And that's just the 1920s
Stoking fears, fears of immoral expression, identifying influences they thought were causing this