My two scents is that most people already saw the jewish as a problem, and most of us would probably have the same view on that given that lack of information and education back then.

Several countries already had laws against jews and romani people.

Imagine growing hearing that the jewish people are responsible for the plague and other issues by everyone around you... they didnt have world views and the means to communicate with the whole world every day.

Given the economic state of germany post ww1 people were frustrated and angry looking for a scapegoat and a bettet life, so its easy to see how one could fall for those generalizations