The other thing I forgot to add is that fascism requires an absence of a united opposition. Fascists never truly win a majority. Instead, they rely on a weak and divided opposition. When there is an opposition capable of addressing the political and economic crisis with effective policies, it reduces the popularity of fascism and increases faith in centrist and left-wing political parties. Indeed, I would argue that FDR's left liberal policies, the most radically left wing policies in American history, relieved the worst effects of the Great Depression and prevented a fascist dictator from taking power in the United States. In Germany, where the opposition was divided due to sectarianism, the fascists were able to destroy their opponents and institute the Enabling Act of 1933, a constitutional coup that allowed the Nazis to perpetrate the Holocaust.
@burnoutqueen The Centrist Party literally voted for the Enabling Act. Partly out of physical cowardice; violence was well established by that point. But "centrists" are often enablers.